content/browser/web_contents/web_contents_impl.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
   6 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
   7
   8 #include <map>
   9 #include <set>
  10 #include <string>
  11
  12 #include "base/compiler_specific.h"
  13 #include "base/containers/scoped_ptr_hash_map.h"
  14 #include "base/gtest_prod_util.h"
  15 #include "base/memory/scoped_ptr.h"
  16 #include "base/observer_list.h"
  17 #include "base/process/process.h"
  18 #include "base/values.h"
  19 #include "content/browser/frame_host/frame_tree.h"
  20 #include "content/browser/frame_host/navigation_controller_delegate.h"
  21 #include "content/browser/frame_host/navigation_controller_impl.h"
  22 #include "content/browser/frame_host/navigator_delegate.h"
  23 #include "content/browser/frame_host/render_frame_host_delegate.h"
  24 #include "content/browser/frame_host/render_frame_host_manager.h"
  25 #include "content/browser/media/audio_state_provider.h"
  26 #include "content/browser/renderer_host/render_view_host_delegate.h"
  27 #include "content/browser/renderer_host/render_view_host_impl.h"
  28 #include "content/browser/renderer_host/render_widget_host_delegate.h"
  29 #include "content/common/accessibility_mode_enums.h"
  30 #include "content/common/content_export.h"
  31 #include "content/public/browser/color_chooser.h"
  32 #include "content/public/browser/notification_observer.h"
  33 #include "content/public/browser/notification_registrar.h"
  34 #include "content/public/browser/web_contents.h"
  35 #include "content/public/common/renderer_preferences.h"
  36 #include "content/public/common/resource_type.h"
  37 #include "content/public/common/three_d_api_types.h"
  38 #include "net/base/load_states.h"
  39 #include "net/http/http_response_headers.h"
  40 #include "third_party/WebKit/public/web/WebDragOperation.h"
  41 #include "ui/base/page_transition_types.h"
  42 #include "ui/gfx/geometry/rect_f.h"
  43 #include "ui/gfx/geometry/size.h"
  44
  45 struct BrowserPluginHostMsg_ResizeGuest_Params;
  46 struct ViewHostMsg_DateTimeDialogValue_Params;
  47
  48 namespace content {
  49 class BrowserPluginEmbedder;
  50 class BrowserPluginGuest;
  51 class BrowserPluginGuestManager;
  52 class DateTimeChooserAndroid;
  53 class DownloadItem;
  54 class GeolocationServiceContext;
  55 class InterstitialPageImpl;
  56 class JavaScriptDialogManager;
  57 class ManifestManagerHost;
  58 class MediaWebContentsObserver;
  59 class PluginContentOriginWhitelist;
  60 class PowerSaveBlocker;
  61 class RenderViewHost;
  62 class RenderViewHostDelegateView;
  63 class RenderWidgetHostImpl;
  64 class SavePackage;
  65 class ScreenOrientationDispatcherHost;
  66 class SiteInstance;
  67 class TestWebContents;
  68 class WebContentsAudioMuter;
  69 class WebContentsDelegate;
  70 class WebContentsImpl;
  71 class WebContentsObserver;
  72 class WebContentsView;
  73 class WebContentsViewDelegate;
  74 struct AXEventNotificationDetails;
  75 struct ColorSuggestion;
  76 struct FaviconURL;
  77 struct LoadNotificationDetails;
  78 struct ResourceRedirectDetails;
  79 struct ResourceRequestDetails;
  80
  81 #if defined(OS_ANDROID)
  82 class WebContentsAndroid;
  83 #endif
  84
  85 // Factory function for the implementations that content knows about. Takes
  86 // ownership of |delegate|.
  87 WebContentsView* CreateWebContentsView(
  88     WebContentsImpl* web_contents,
  89     WebContentsViewDelegate* delegate,
  90     RenderViewHostDelegateView** render_view_host_delegate_view);
  91
  92 class CONTENT_EXPORT WebContentsImpl
  93     : public NON_EXPORTED_BASE(WebContents),
  94       public NON_EXPORTED_BASE(RenderFrameHostDelegate),
  95       public RenderViewHostDelegate,
  96       public RenderWidgetHostDelegate,
  97       public RenderFrameHostManager::Delegate,
  98       public NotificationObserver,
  99       public NON_EXPORTED_BASE(NavigationControllerDelegate),
 100       public NON_EXPORTED_BASE(NavigatorDelegate) {
 101  public:
 102   class FriendZone;
 103
 104   ~WebContentsImpl() override;
 105
 106   static WebContentsImpl* CreateWithOpener(
 107       const WebContents::CreateParams& params,
 108       FrameTreeNode* opener);
 109
 110   static std::vector<WebContentsImpl*> GetAllWebContents();
 111
 112   static WebContentsImpl* FromFrameTreeNode(FrameTreeNode* frame_tree_node);
 113
 114   // Creates a swapped out RenderView. This is used by the browser plugin to
 115   // create a swapped out RenderView in the embedder render process for the
 116   // guest, to expose the guest's window object to the embedder.
 117   // This returns the routing ID of the newly created swapped out RenderView.
 118   int CreateSwappedOutRenderView(SiteInstance* instance);
 119
 120   // Complex initialization here. Specifically needed to avoid having
 121   // members call back into our virtual functions in the constructor.
 122   virtual void Init(const WebContents::CreateParams& params);
 123
 124   // Returns the SavePackage which manages the page saving job. May be NULL.
 125   SavePackage* save_package() const { return save_package_.get(); }
 126
 127 #if defined(OS_ANDROID)
 128   // In Android WebView, the RenderView needs created even there is no
 129   // navigation entry, this allows Android WebViews to use
 130   // javascript: URLs that load into the DOMWindow before the first page
 131   // load. This is not safe to do in any context that a web page could get a
 132   // reference to the DOMWindow before the first page load.
 133   bool CreateRenderViewForInitialEmptyDocument();
 134 #endif
 135
 136   // Expose the render manager for testing.
 137   // TODO(creis): Remove this now that we can get to it via FrameTreeNode.
 138   RenderFrameHostManager* GetRenderManagerForTesting();
 139
 140   // Returns guest browser plugin object, or NULL if this WebContents is not a
 141   // guest.
 142   BrowserPluginGuest* GetBrowserPluginGuest() const;
 143
 144   // Sets a BrowserPluginGuest object for this WebContents. If this WebContents
 145   // has a BrowserPluginGuest then that implies that it is being hosted by
 146   // a BrowserPlugin object in an embedder renderer process.
 147   void SetBrowserPluginGuest(BrowserPluginGuest* guest);
 148
 149   // Returns embedder browser plugin object, or NULL if this WebContents is not
 150   // an embedder.
 151   BrowserPluginEmbedder* GetBrowserPluginEmbedder() const;
 152
 153   // Creates a BrowserPluginEmbedder object for this WebContents if one doesn't
 154   // already exist.
 155   void CreateBrowserPluginEmbedderIfNecessary();
 156
 157   // Cancels modal dialogs in this WebContents, as well as in any browser
 158   // plugins it is hosting.
 159   void CancelActiveAndPendingDialogs();
 160
 161   // Gets the current fullscreen render widget's routing ID. Returns
 162   // MSG_ROUTING_NONE when there is no fullscreen render widget.
 163   int GetFullscreenWidgetRoutingID() const;
 164
 165   // Invoked when visible SSL state (as defined by SSLStatus) changes.
 166   void DidChangeVisibleSSLState();
 167
 168   // Informs the render view host and the BrowserPluginEmbedder, if present, of
 169   // a Drag Source End.
 170   void DragSourceEndedAt(int client_x, int client_y, int screen_x,
 171       int screen_y, blink::WebDragOperation operation);
 172
 173   // A response has been received for a resource request.
 174   void DidGetResourceResponseStart(
 175       const ResourceRequestDetails& details);
 176
 177   // A redirect was received while requesting a resource.
 178   void DidGetRedirectForResourceRequest(
 179       RenderFrameHost* render_frame_host,
 180       const ResourceRedirectDetails& details);
 181
 182   // Notify observers that the web contents has been focused.
 183   void NotifyWebContentsFocused();
 184
 185   WebContentsView* GetView() const;
 186
 187   ScreenOrientationDispatcherHost* screen_orientation_dispatcher_host() {
 188     return screen_orientation_dispatcher_host_.get();
 189   }
 190
 191   bool should_normally_be_visible() { return should_normally_be_visible_; }
 192
 193   // Indicate if the window has been occluded, and pass this to the views, only
 194   // if there is no active capture going on (otherwise it is dropped on the
 195   // floor).
 196   void WasOccluded();
 197   void WasUnOccluded();
 198
 199   // Broadcasts the mode change to all frames.
 200   void SetAccessibilityMode(AccessibilityMode mode);
 201
 202   // Adds the given accessibility mode to the current accessibility mode
 203   // bitmap.
 204   void AddAccessibilityMode(AccessibilityMode mode);
 205
 206   // Removes the given accessibility mode from the current accessibility
 207   // mode bitmap, managing the bits that are shared with other modes such
 208   // that a bit will only be turned off when all modes that depend on it
 209   // have been removed.
 210   void RemoveAccessibilityMode(AccessibilityMode mode);
 211
 212   // Request a one-time snapshot of the accessibility tree without changing
 213   // the accessibility mode.
 214   using AXTreeSnapshotCallback =
 215       base::Callback<void(const ui::AXTreeUpdate<ui::AXNodeData>&)>;
 216   void RequestAXTreeSnapshot(AXTreeSnapshotCallback callback);
 217
 218   // WebContents ------------------------------------------------------
 219   WebContentsDelegate* GetDelegate() override;
 220   void SetDelegate(WebContentsDelegate* delegate) override;
 221   NavigationControllerImpl& GetController() override;
 222   const NavigationControllerImpl& GetController() const override;
 223   BrowserContext* GetBrowserContext() const override;
 224   const GURL& GetURL() const override;
 225   const GURL& GetVisibleURL() const override;
 226   const GURL& GetLastCommittedURL() const override;
 227   RenderProcessHost* GetRenderProcessHost() const override;
 228   RenderFrameHostImpl* GetMainFrame() override;
 229   RenderFrameHostImpl* GetFocusedFrame() override;
 230   void ForEachFrame(
 231       const base::Callback<void(RenderFrameHost*)>& on_frame) override;
 232   void SendToAllFrames(IPC::Message* message) override;
 233   RenderViewHostImpl* GetRenderViewHost() const override;
 234   int GetRoutingID() const override;
 235   RenderWidgetHostView* GetRenderWidgetHostView() const override;
 236   void ClosePage() override;
 237   RenderWidgetHostView* GetFullscreenRenderWidgetHostView() const override;
 238   SkColor GetThemeColor() const override;
 239   WebUI* CreateWebUI(const GURL& url) override;
 240   WebUI* GetWebUI() const override;
 241   WebUI* GetCommittedWebUI() const override;
 242   void SetUserAgentOverride(const std::string& override) override;
 243   const std::string& GetUserAgentOverride() const override;
 244   void EnableTreeOnlyAccessibilityMode() override;
 245   bool IsTreeOnlyAccessibilityModeForTesting() const override;
 246   bool IsFullAccessibilityModeForTesting() const override;
 247 #if defined(OS_WIN)
 248   void SetParentNativeViewAccessible(
 249       gfx::NativeViewAccessible accessible_parent) override;
 250 #endif
 251   const base::string16& GetTitle() const override;
 252   int32 GetMaxPageID() override;
 253   int32 GetMaxPageIDForSiteInstance(SiteInstance* site_instance) override;
 254   SiteInstanceImpl* GetSiteInstance() const override;
 255   SiteInstanceImpl* GetPendingSiteInstance() const override;
 256   bool IsLoading() const override;
 257   bool IsLoadingToDifferentDocument() const override;
 258   bool IsWaitingForResponse() const override;
 259   const net::LoadStateWithParam& GetLoadState() const override;
 260   const base::string16& GetLoadStateHost() const override;
 261   uint64 GetUploadSize() const override;
 262   uint64 GetUploadPosition() const override;
 263   std::set<GURL> GetSitesInTab() const override;
 264   const std::string& GetEncoding() const override;
 265   bool DisplayedInsecureContent() const override;
 266   void IncrementCapturerCount(const gfx::Size& capture_size) override;
 267   void DecrementCapturerCount() override;
 268   int GetCapturerCount() const override;
 269   bool IsAudioMuted() const override;
 270   void SetAudioMuted(bool mute) override;
 271   bool IsCrashed() const override;
 272   void SetIsCrashed(base::TerminationStatus status, int error_code) override;
 273   base::TerminationStatus GetCrashedStatus() const override;
 274   bool IsBeingDestroyed() const override;
 275   void NotifyNavigationStateChanged(InvalidateTypes changed_flags) override;
 276   base::TimeTicks GetLastActiveTime() const override;
 277   void SetLastActiveTime(base::TimeTicks last_active_time) override;
 278   void WasShown() override;
 279   void WasHidden() override;
 280   bool NeedToFireBeforeUnload() override;
 281   void DispatchBeforeUnload(bool for_cross_site_transition) override;
 282   void AttachToOuterWebContentsFrame(
 283       WebContents* outer_web_contents,
 284       RenderFrameHost* outer_contents_frame) override;
 285   void Stop() override;
 286   WebContents* Clone() override;
 287   void ReloadFocusedFrame(bool ignore_cache) override;
 288   void Undo() override;
 289   void Redo() override;
 290   void Cut() override;
 291   void Copy() override;
 292   void CopyToFindPboard() override;
 293   void Paste() override;
 294   void PasteAndMatchStyle() override;
 295   void Delete() override;
 296   void SelectAll() override;
 297   void Unselect() override;
 298   void Replace(const base::string16& word) override;
 299   void ReplaceMisspelling(const base::string16& word) override;
 300   void NotifyContextMenuClosed(
 301       const CustomContextMenuContext& context) override;
 302   void ExecuteCustomContextMenuCommand(
 303       int action,
 304       const CustomContextMenuContext& context) override;
 305   gfx::NativeView GetNativeView() override;
 306   gfx::NativeView GetContentNativeView() override;
 307   gfx::NativeWindow GetTopLevelNativeWindow() override;
 308   gfx::Rect GetContainerBounds() override;
 309   gfx::Rect GetViewBounds() override;
 310   DropData* GetDropData() override;
 311   void Focus() override;
 312   void SetInitialFocus() override;
 313   void StoreFocus() override;
 314   void RestoreFocus() override;
 315   void FocusThroughTabTraversal(bool reverse) override;
 316   bool ShowingInterstitialPage() const override;
 317   InterstitialPage* GetInterstitialPage() const override;
 318   bool IsSavable() override;
 319   void OnSavePage() override;
 320   bool SavePage(const base::FilePath& main_file,
 321                 const base::FilePath& dir_path,
 322                 SavePageType save_type) override;
 323   void SaveFrame(const GURL& url, const Referrer& referrer) override;
 324   void SaveFrameWithHeaders(const GURL& url,
 325                             const Referrer& referrer,
 326                             const std::string& headers) override;
 327   void GenerateMHTML(const base::FilePath& file,
 328                      const base::Callback<void(int64)>& callback) override;
 329   const std::string& GetContentsMimeType() const override;
 330   bool WillNotifyDisconnection() const override;
 331   void SetOverrideEncoding(const std::string& encoding) override;
 332   void ResetOverrideEncoding() override;
 333   RendererPreferences* GetMutableRendererPrefs() override;
 334   void Close() override;
 335   void SystemDragEnded() override;
 336   void UserGestureDone() override;
 337   void SetClosedByUserGesture(bool value) override;
 338   bool GetClosedByUserGesture() const override;
 339   void ViewSource() override;
 340   void ViewFrameSource(const GURL& url, const PageState& page_state) override;
 341   int GetMinimumZoomPercent() const override;
 342   int GetMaximumZoomPercent() const override;
 343   void ResetPageScale() override;
 344   gfx::Size GetPreferredSize() const override;
 345   bool GotResponseToLockMouseRequest(bool allowed) override;
 346   bool HasOpener() const override;
 347   WebContentsImpl* GetOpener() const override;
 348   void DidChooseColorInColorChooser(SkColor color) override;
 349   void DidEndColorChooser() override;
 350   int DownloadImage(const GURL& url,
 351                     bool is_favicon,
 352                     uint32_t max_bitmap_size,
 353                     bool bypass_cache,
 354                     const ImageDownloadCallback& callback) override;
 355   bool IsSubframe() const override;
 356   void Find(int request_id,
 357             const base::string16& search_text,
 358             const blink::WebFindOptions& options) override;
 359   void StopFinding(StopFindAction action) override;
 360   void InsertCSS(const std::string& css) override;
 361   bool WasRecentlyAudible() override;
 362   void GetManifest(const GetManifestCallback&) override;
 363   void ExitFullscreen() override;
 364   void ResumeLoadingCreatedWebContents() override;
 365 #if defined(OS_ANDROID)
 366   void OnMediaSessionStateChanged();
 367   void ResumeMediaSession() override;
 368   void SuspendMediaSession() override;
 369
 370   base::android::ScopedJavaLocalRef<jobject> GetJavaWebContents() override;
 371   virtual WebContentsAndroid* GetWebContentsAndroid();
 372 #elif defined(OS_MACOSX)
 373   void SetAllowOtherViews(bool allow) override;
 374   bool GetAllowOtherViews() override;
 375 #endif
 376
 377   // Implementation of PageNavigator.
 378   WebContents* OpenURL(const OpenURLParams& params) override;
 379
 380   // Implementation of IPC::Sender.
 381   bool Send(IPC::Message* message) override;
 382
 383   // RenderFrameHostDelegate ---------------------------------------------------
 384   bool OnMessageReceived(RenderFrameHost* render_frame_host,
 385                          const IPC::Message& message) override;
 386   const GURL& GetMainFrameLastCommittedURL() const override;
 387   void RenderFrameCreated(RenderFrameHost* render_frame_host) override;
 388   void RenderFrameDeleted(RenderFrameHost* render_frame_host) override;
 389   void SwappedOut(RenderFrameHost* render_frame_host) override;
 390   void ShowContextMenu(RenderFrameHost* render_frame_host,
 391                        const ContextMenuParams& params) override;
 392   void RunJavaScriptMessage(RenderFrameHost* render_frame_host,
 393                             const base::string16& message,
 394                             const base::string16& default_prompt,
 395                             const GURL& frame_url,
 396                             JavaScriptMessageType type,
 397                             IPC::Message* reply_msg) override;
 398   void RunBeforeUnloadConfirm(RenderFrameHost* render_frame_host,
 399                               const base::string16& message,
 400                               bool is_reload,
 401                               IPC::Message* reply_msg) override;
 402   void DidAccessInitialDocument() override;
 403   void DidChangeName(RenderFrameHost* render_frame_host,
 404                      const std::string& name) override;
 405   void DocumentOnLoadCompleted(RenderFrameHost* render_frame_host) override;
 406   void UpdateTitle(RenderFrameHost* render_frame_host,
 407                    int32 page_id,
 408                    const base::string16& title,
 409                    base::i18n::TextDirection title_direction) override;
 410   void UpdateEncoding(RenderFrameHost* render_frame_host,
 411                       const std::string& encoding) override;
 412   WebContents* GetAsWebContents() override;
 413   bool IsNeverVisible() override;
 414   AccessibilityMode GetAccessibilityMode() const override;
 415   void AccessibilityEventReceived(
 416       const std::vector<AXEventNotificationDetails>& details) override;
 417   RenderFrameHost* GetGuestByInstanceID(
 418       RenderFrameHost* render_frame_host,
 419       int browser_plugin_instance_id) override;
 420   GeolocationServiceContext* GetGeolocationServiceContext() override;
 421   void EnterFullscreenMode(const GURL& origin) override;
 422   void ExitFullscreenMode() override;
 423   bool ShouldRouteMessageEvent(
 424       RenderFrameHost* target_rfh,
 425       SiteInstance* source_site_instance) const override;
 426   void EnsureOpenerProxiesExist(RenderFrameHost* source_rfh) override;
 427 #if defined(OS_WIN)
 428   gfx::NativeViewAccessible GetParentNativeViewAccessible() override;
 429 #endif
 430
 431   // RenderViewHostDelegate ----------------------------------------------------
 432   RenderViewHostDelegateView* GetDelegateView() override;
 433   bool OnMessageReceived(RenderViewHost* render_view_host,
 434                          const IPC::Message& message) override;
 435   // RenderFrameHostDelegate has the same method, so list it there because this
 436   // interface is going away.
 437   // WebContents* GetAsWebContents() override;
 438   gfx::Rect GetRootWindowResizerRect() const override;
 439   void RenderViewCreated(RenderViewHost* render_view_host) override;
 440   void RenderViewReady(RenderViewHost* render_view_host) override;
 441   void RenderViewTerminated(RenderViewHost* render_view_host,
 442                             base::TerminationStatus status,
 443                             int error_code) override;
 444   void RenderViewDeleted(RenderViewHost* render_view_host) override;
 445   void UpdateState(RenderViewHost* render_view_host,
 446                    int32 page_id,
 447                    const PageState& page_state) override;
 448   void UpdateTargetURL(RenderViewHost* render_view_host,
 449                        const GURL& url) override;
 450   void Close(RenderViewHost* render_view_host) override;
 451   void RequestMove(const gfx::Rect& new_bounds) override;
 452   void DidCancelLoading() override;
 453   void DocumentAvailableInMainFrame(RenderViewHost* render_view_host) override;
 454   void RouteCloseEvent(RenderViewHost* rvh) override;
 455   bool AddMessageToConsole(int32 level,
 456                            const base::string16& message,
 457                            int32 line_no,
 458                            const base::string16& source_id) override;
 459   RendererPreferences GetRendererPrefs(
 460       BrowserContext* browser_context) const override;
 461   void OnUserGesture() override;
 462   void OnIgnoredUIEvent() override;
 463   void RendererUnresponsive(RenderViewHost* render_view_host) override;
 464   void RendererResponsive(RenderViewHost* render_view_host) override;
 465   void LoadStateChanged(const GURL& url,
 466                         const net::LoadStateWithParam& load_state,
 467                         uint64 upload_position,
 468                         uint64 upload_size) override;
 469   void Activate() override;
 470   void Deactivate() override;
 471   void LostCapture() override;
 472   void RunFileChooser(RenderViewHost* render_view_host,
 473                       const FileChooserParams& params) override;
 474   bool IsFullscreenForCurrentTab() const override;
 475   blink::WebDisplayMode GetDisplayMode() const override;
 476   void UpdatePreferredSize(const gfx::Size& pref_size) override;
 477   void ResizeDueToAutoResize(const gfx::Size& new_size) override;
 478   void RequestToLockMouse(bool user_gesture,
 479                           bool last_unlocked_by_target) override;
 480   void LostMouseLock() override;
 481   void CreateNewWindow(
 482       SiteInstance* source_site_instance,
 483       int route_id,
 484       int main_frame_route_id,
 485       const ViewHostMsg_CreateWindow_Params& params,
 486       SessionStorageNamespace* session_storage_namespace) override;
 487   void CreateNewWidget(int render_process_id,
 488                        int route_id,
 489                        blink::WebPopupType popup_type) override;
 490   void CreateNewFullscreenWidget(int render_process_id, int route_id) override;
 491   void ShowCreatedWindow(int route_id,
 492                          WindowOpenDisposition disposition,
 493                          const gfx::Rect& initial_rect,
 494                          bool user_gesture) override;
 495   void ShowCreatedWidget(int route_id, const gfx::Rect& initial_rect) override;
 496   void ShowCreatedFullscreenWidget(int route_id) override;
 497   void RequestMediaAccessPermission(
 498       const MediaStreamRequest& request,
 499       const MediaResponseCallback& callback) override;
 500   bool CheckMediaAccessPermission(const GURL& security_origin,
 501                                   MediaStreamType type) override;
 502   SessionStorageNamespace* GetSessionStorageNamespace(
 503       SiteInstance* instance) override;
 504   SessionStorageNamespaceMap GetSessionStorageNamespaceMap() override;
 505   FrameTree* GetFrameTree() override;
 506   void SetIsVirtualKeyboardRequested(bool requested) override;
 507   bool IsVirtualKeyboardRequested() override;
 508
 509   // NavigatorDelegate ---------------------------------------------------------
 510
 511   void DidStartNavigation(NavigationHandle* navigation_handle) override;
 512   void DidRedirectNavigation(NavigationHandle* navigation_handle) override;
 513   void DidCommitNavigation(NavigationHandle* navigation_handle) override;
 514   void DidFinishNavigation(NavigationHandle* navigation_handle) override;
 515   void DidStartProvisionalLoad(RenderFrameHostImpl* render_frame_host,
 516                                const GURL& validated_url,
 517                                bool is_error_page,
 518                                bool is_iframe_srcdoc) override;
 519   void DidFailProvisionalLoadWithError(
 520       RenderFrameHostImpl* render_frame_host,
 521       const FrameHostMsg_DidFailProvisionalLoadWithError_Params& params)
 522       override;
 523   void DidFailLoadWithError(RenderFrameHostImpl* render_frame_host,
 524                             const GURL& url,
 525                             int error_code,
 526                             const base::string16& error_description,
 527                             bool was_ignored_by_handler) override;
 528   void DidCommitProvisionalLoad(RenderFrameHostImpl* render_frame_host,
 529                                 const GURL& url,
 530                                 ui::PageTransition transition_type) override;
 531   void DidNavigateMainFramePreCommit(bool navigation_is_within_page) override;
 532   void DidNavigateMainFramePostCommit(
 533       RenderFrameHostImpl* render_frame_host,
 534       const LoadCommittedDetails& details,
 535       const FrameHostMsg_DidCommitProvisionalLoad_Params& params) override;
 536   void DidNavigateAnyFramePostCommit(
 537       RenderFrameHostImpl* render_frame_host,
 538       const LoadCommittedDetails& details,
 539       const FrameHostMsg_DidCommitProvisionalLoad_Params& params) override;
 540   void SetMainFrameMimeType(const std::string& mime_type) override;
 541   bool CanOverscrollContent() const override;
 542   void NotifyChangedNavigationState(InvalidateTypes changed_flags) override;
 543   void AboutToNavigateRenderFrame(
 544       RenderFrameHostImpl* old_host,
 545       RenderFrameHostImpl* new_host) override;
 546   void DidStartNavigationToPendingEntry(
 547       const GURL& url,
 548       NavigationController::ReloadType reload_type) override;
 549   void RequestOpenURL(RenderFrameHostImpl* render_frame_host,
 550                       const OpenURLParams& params) override;
 551   bool ShouldPreserveAbortedURLs() override;
 552   void DidStartLoading(FrameTreeNode* frame_tree_node,
 553                        bool to_different_document) override;
 554   void DidStopLoading() override;
 555   void DidChangeLoadProgress() override;
 556
 557   // RenderWidgetHostDelegate --------------------------------------------------
 558
 559   void RenderWidgetDeleted(RenderWidgetHostImpl* render_widget_host) override;
 560   void RenderWidgetGotFocus(RenderWidgetHostImpl* render_widget_host) override;
 561   void RenderWidgetWasResized(RenderWidgetHostImpl* render_widget_host,
 562                               bool width_changed) override;
 563   void ScreenInfoChanged() override;
 564   bool PreHandleKeyboardEvent(const NativeWebKeyboardEvent& event,
 565                               bool* is_keyboard_shortcut) override;
 566   void HandleKeyboardEvent(const NativeWebKeyboardEvent& event) override;
 567   bool HandleWheelEvent(const blink::WebMouseWheelEvent& event) override;
 568   bool PreHandleGestureEvent(const blink::WebGestureEvent& event) override;
 569   void DidSendScreenRects(RenderWidgetHostImpl* rwh) override;
 570   BrowserAccessibilityManager* GetRootBrowserAccessibilityManager() override;
 571   BrowserAccessibilityManager* GetOrCreateRootBrowserAccessibilityManager()
 572       override;
 573   // The following 4 functions are already listed under WebContents overrides:
 574   // void Cut() override;
 575   // void Copy() override;
 576   // void Paste() override;
 577   // void SelectAll() override;
 578   void MoveRangeSelectionExtent(const gfx::Point& extent) override;
 579   void SelectRange(const gfx::Point& base, const gfx::Point& extent) override;
 580   void AdjustSelectionByCharacterOffset(int start_adjust, int end_adjust)
 581       override;
 582
 583   // RenderFrameHostManager::Delegate ------------------------------------------
 584
 585   bool CreateRenderViewForRenderManager(
 586       RenderViewHost* render_view_host,
 587       int opener_frame_routing_id,
 588       int proxy_routing_id,
 589       const FrameReplicationState& replicated_frame_state,
 590       bool for_main_frame_navigation) override;
 591   bool CreateRenderFrameForRenderManager(RenderFrameHost* render_frame_host,
 592                                          int parent_routing_id,
 593                                          int previous_sibling_routing_id,
 594                                          int proxy_routing_id) override;
 595   void BeforeUnloadFiredFromRenderManager(
 596       bool proceed,
 597       const base::TimeTicks& proceed_time,
 598       bool* proceed_to_fire_unload) override;
 599   void RenderProcessGoneFromRenderManager(
 600       RenderViewHost* render_view_host) override;
 601   void UpdateRenderViewSizeForRenderManager() override;
 602   void CancelModalDialogsForRenderManager() override;
 603   void NotifySwappedFromRenderManager(RenderFrameHost* old_host,
 604                                       RenderFrameHost* new_host,
 605                                       bool is_main_frame) override;
 606   void NotifyMainFrameSwappedFromRenderManager(
 607       RenderViewHost* old_host,
 608       RenderViewHost* new_host) override;
 609   NavigationControllerImpl& GetControllerForRenderManager() override;
 610   scoped_ptr<WebUIImpl> CreateWebUIForRenderManager(const GURL& url) override;
 611   NavigationEntry* GetLastCommittedNavigationEntryForRenderManager() override;
 612   bool FocusLocationBarByDefault() override;
 613   void SetFocusToLocationBar(bool select_all) override;
 614   bool IsHidden() override;
 615   int GetOuterDelegateFrameTreeNodeID() override;
 616
 617   // NotificationObserver ------------------------------------------------------
 618
 619   void Observe(int type,
 620                const NotificationSource& source,
 621                const NotificationDetails& details) override;
 622
 623   // NavigationControllerDelegate ----------------------------------------------
 624
 625   WebContents* GetWebContents() override;
 626   void NotifyNavigationEntryCommitted(
 627       const LoadCommittedDetails& load_details) override;
 628
 629   // Invoked before a form repost warning is shown.
 630   void NotifyBeforeFormRepostWarningShow() override;
 631
 632   // Activate this WebContents and show a form repost warning.
 633   void ActivateAndShowRepostFormWarningDialog() override;
 634
 635   // Whether the initial empty page of this view has been accessed by another
 636   // page, making it unsafe to show the pending URL. Always false after the
 637   // first commit.
 638   bool HasAccessedInitialDocument() override;
 639
 640   // Updates the max page ID for the current SiteInstance in this
 641   // WebContentsImpl to be at least |page_id|.
 642   void UpdateMaxPageID(int32 page_id) override;
 643
 644   // Updates the max page ID for the given SiteInstance in this WebContentsImpl
 645   // to be at least |page_id|.
 646   void UpdateMaxPageIDForSiteInstance(SiteInstance* site_instance,
 647                                       int32 page_id) override;
 648
 649   // Copy the current map of SiteInstance ID to max page ID from another tab.
 650   // This is necessary when this tab adopts the NavigationEntries from
 651   // |web_contents|.
 652   void CopyMaxPageIDsFrom(WebContents* web_contents) override;
 653
 654   // Sets the history for this WebContentsImpl to |history_length| entries, with
 655   // an offset of |history_offset|.
 656   void SetHistoryOffsetAndLength(int history_offset,
 657                                  int history_length) override;
 658
 659   // Called by InterstitialPageImpl when it creates a RenderFrameHost.
 660   void RenderFrameForInterstitialPageCreated(
 661       RenderFrameHost* render_frame_host) override;
 662
 663   // Sets the passed interstitial as the currently showing interstitial.
 664   // No interstitial page should already be attached.
 665   void AttachInterstitialPage(InterstitialPageImpl* interstitial_page) override;
 666
 667   // Unsets the currently showing interstitial.
 668   void DetachInterstitialPage() override;
 669
 670   // Changes the IsLoading state and notifies the delegate as needed.
 671   // |details| is used to provide details on the load that just finished
 672   // (but can be null if not applicable).
 673   void SetIsLoading(bool is_loading,
 674                     bool to_different_document,
 675                     LoadNotificationDetails* details) override;
 676
 677   typedef base::Callback<void(WebContents*)> CreatedCallback;
 678
 679   // Forces overscroll to be disabled (used by touch emulation).
 680   void SetForceDisableOverscrollContent(bool force_disable);
 681
 682   AudioStateProvider* audio_state_provider() {
 683     return audio_state_provider_.get();
 684   }
 685
 686   bool has_audio_power_save_blocker_for_testing() const {
 687     return audio_power_save_blocker_;
 688   }
 689
 690   bool has_video_power_save_blocker_for_testing() const {
 691     return video_power_save_blocker_;
 692   }
 693
 694 #if defined(ENABLE_BROWSER_CDMS)
 695   MediaWebContentsObserver* media_web_contents_observer() {
 696     return media_web_contents_observer_.get();
 697   }
 698 #endif
 699
 700  private:
 701   friend class WebContentsObserver;
 702   friend class WebContents;  // To implement factory methods.
 703
 704   FRIEND_TEST_ALL_PREFIXES(WebContentsImplTest, NoJSMessageOnInterstitials);
 705   FRIEND_TEST_ALL_PREFIXES(WebContentsImplTest, UpdateTitle);
 706   FRIEND_TEST_ALL_PREFIXES(WebContentsImplTest, FindOpenerRVHWhenPending);
 707   FRIEND_TEST_ALL_PREFIXES(WebContentsImplTest,
 708                            CrossSiteCantPreemptAfterUnload);
 709   FRIEND_TEST_ALL_PREFIXES(WebContentsImplTest, PendingContents);
 710   FRIEND_TEST_ALL_PREFIXES(WebContentsImplTest, FrameTreeShape);
 711   FRIEND_TEST_ALL_PREFIXES(WebContentsImplTest, GetLastActiveTime);
 712   FRIEND_TEST_ALL_PREFIXES(WebContentsImplTest,
 713                            LoadResourceFromMemoryCacheWithBadSecurityInfo);
 714   FRIEND_TEST_ALL_PREFIXES(FormStructureBrowserTest, HTMLFiles);
 715   FRIEND_TEST_ALL_PREFIXES(NavigationControllerTest, HistoryNavigate);
 716   FRIEND_TEST_ALL_PREFIXES(RenderFrameHostManagerTest, PageDoesBackAndReload);
 717   FRIEND_TEST_ALL_PREFIXES(SitePerProcessBrowserTest, CrossSiteIframe);
 718   FRIEND_TEST_ALL_PREFIXES(SitePerProcessAccessibilityBrowserTest,
 719                            CrossSiteIframeAccessibility);
 720
 721   // So InterstitialPageImpl can access SetIsLoading.
 722   friend class InterstitialPageImpl;
 723
 724   // TODO(brettw) TestWebContents shouldn't exist!
 725   friend class TestWebContents;
 726
 727   class DestructionObserver;
 728
 729   // Represents a WebContents node in a tree of WebContents structure.
 730   //
 731   // Two WebContents with separate FrameTrees can be connected by
 732   // outer/inner relationship using this class. Note that their FrameTrees
 733   // still remain disjoint.
 734   // The parent is referred to as "outer WebContents" and the descendents are
 735   // referred to as "inner WebContents".
 736   // For each inner WebContents, the outer WebContents will have a
 737   // corresponding FrameTreeNode.
 738   struct WebContentsTreeNode {
 739    public:
 740     WebContentsTreeNode();
 741     ~WebContentsTreeNode();
 742
 743     typedef std::set<WebContentsTreeNode*> ChildrenSet;
 744
 745     void ConnectToOuterWebContents(WebContentsImpl* outer_web_contents,
 746                                    RenderFrameHostImpl* outer_contents_frame);
 747
 748     WebContentsImpl* outer_web_contents() { return outer_web_contents_; }
 749     int outer_contents_frame_tree_node_id() {
 750       return outer_contents_frame_tree_node_id_;
 751     }
 752
 753    private:
 754     // The outer Webontents.
 755     WebContentsImpl* outer_web_contents_;
 756     // The ID of the FrameTreeNode in outer WebContents that is hosting us.
 757     int outer_contents_frame_tree_node_id_;
 758     // List of inner WebContents that we host.
 759     ChildrenSet inner_web_contents_tree_nodes_;
 760   };
 761
 762   // See WebContents::Create for a description of these parameters.
 763   WebContentsImpl(BrowserContext* browser_context);
 764
 765   // Add and remove observers for page navigation notifications. The order in
 766   // which notifications are sent to observers is undefined. Clients must be
 767   // sure to remove the observer before they go away.
 768   void AddObserver(WebContentsObserver* observer);
 769   void RemoveObserver(WebContentsObserver* observer);
 770
 771   // Clears a pending contents that has been closed before being shown.
 772   void OnWebContentsDestroyed(WebContentsImpl* web_contents);
 773
 774   // Creates and adds to the map a destruction observer watching |web_contents|.
 775   // No-op if such an observer already exists.
 776   void AddDestructionObserver(WebContentsImpl* web_contents);
 777
 778   // Deletes and removes from the map a destruction observer
 779   // watching |web_contents|. No-op if there is no such observer.
 780   void RemoveDestructionObserver(WebContentsImpl* web_contents);
 781
 782   // Traverses all the RenderFrameHosts in the FrameTree and creates a set
 783   // all the unique RenderWidgetHostViews.
 784   std::set<RenderWidgetHostView*> GetRenderWidgetHostViewsInTree();
 785
 786   // Callback function when showing JavaScript dialogs.  Takes in a routing ID
 787   // pair to identify the RenderFrameHost that opened the dialog, because it's
 788   // possible for the RenderFrameHost to be deleted by the time this is called.
 789   void OnDialogClosed(int render_process_id,
 790                       int render_frame_id,
 791                       IPC::Message* reply_msg,
 792                       bool dialog_was_suppressed,
 793                       bool success,
 794                       const base::string16& user_input);
 795
 796   bool OnMessageReceived(RenderViewHost* render_view_host,
 797                          RenderFrameHost* render_frame_host,
 798                          const IPC::Message& message);
 799
 800   // Checks whether render_frame_message_source_ is set to non-null value,
 801   // otherwise it terminates the main frame renderer process.
 802   bool HasValidFrameSource();
 803
 804   // IPC message handlers.
 805   void OnThemeColorChanged(SkColor theme_color);
 806   void OnDidLoadResourceFromMemoryCache(const GURL& url,
 807                                         const std::string& security_info,
 808                                         const std::string& http_request,
 809                                         const std::string& mime_type,
 810                                         ResourceType resource_type);
 811   void OnDidDisplayInsecureContent();
 812   void OnDidRunInsecureContent(const std::string& security_origin,
 813                                const GURL& target_url);
 814   void OnDocumentLoadedInFrame();
 815   void OnDidFinishLoad(const GURL& url);
 816   void OnGoToEntryAtOffset(int offset);
 817   void OnUpdateZoomLimits(int minimum_percent,
 818                           int maximum_percent);
 819   void OnEnumerateDirectory(int request_id, const base::FilePath& path);
 820
 821   void OnRegisterProtocolHandler(const std::string& protocol,
 822                                  const GURL& url,
 823                                  const base::string16& title,
 824                                  bool user_gesture);
 825   void OnUnregisterProtocolHandler(const std::string& protocol,
 826                                    const GURL& url,
 827                                    bool user_gesture);
 828   void OnFindReply(int request_id,
 829                    int number_of_matches,
 830                    const gfx::Rect& selection_rect,
 831                    int active_match_ordinal,
 832                    bool final_update);
 833 #if defined(OS_ANDROID)
 834   void OnFindMatchRectsReply(int version,
 835                              const std::vector<gfx::RectF>& rects,
 836                              const gfx::RectF& active_rect);
 837
 838   void OnOpenDateTimeDialog(
 839       const ViewHostMsg_DateTimeDialogValue_Params& value);
 840 #endif
 841   void OnDomOperationResponse(const std::string& json_string,
 842                               int automation_id);
 843   void OnAppCacheAccessed(const GURL& manifest_url, bool blocked_by_policy);
 844   void OnOpenColorChooser(int color_chooser_id,
 845                           SkColor color,
 846                           const std::vector<ColorSuggestion>& suggestions);
 847   void OnEndColorChooser(int color_chooser_id);
 848   void OnSetSelectedColorInColorChooser(int color_chooser_id, SkColor color);
 849   void OnWebUISend(const GURL& source_url,
 850                    const std::string& name,
 851                    const base::ListValue& args);
 852 #if defined(ENABLE_PLUGINS)
 853   void OnPepperInstanceCreated();
 854   void OnPepperInstanceDeleted();
 855   void OnPepperPluginHung(int plugin_child_id,
 856                           const base::FilePath& path,
 857                           bool is_hung);
 858   void OnPluginCrashed(const base::FilePath& plugin_path,
 859                        base::ProcessId plugin_pid);
 860   void OnRequestPpapiBrokerPermission(int routing_id,
 861                                       const GURL& url,
 862                                       const base::FilePath& plugin_path);
 863
 864   // Callback function when requesting permission to access the PPAPI broker.
 865   // |result| is true if permission was granted.
 866   void OnPpapiBrokerPermissionResult(int routing_id, bool result);
 867
 868   void OnBrowserPluginMessage(RenderFrameHost* render_frame_host,
 869                               const IPC::Message& message);
 870 #endif  // defined(ENABLE_PLUGINS)
 871   void OnUpdateFaviconURL(const std::vector<FaviconURL>& candidates);
 872   void OnFirstVisuallyNonEmptyPaint();
 873   void OnMediaPlayingNotification(int64 player_cookie,
 874                                   bool has_video,
 875                                   bool has_audio,
 876                                   bool is_remote);
 877   void OnMediaPausedNotification(int64 player_cookie);
 878   void OnShowValidationMessage(const gfx::Rect& anchor_in_root_view,
 879                                const base::string16& main_text,
 880                                const base::string16& sub_text);
 881   void OnHideValidationMessage();
 882   void OnMoveValidationMessage(const gfx::Rect& anchor_in_root_view);
 883
 884   // Called by derived classes to indicate that we're no longer waiting for a
 885   // response. This won't actually update the throbber, but it will get picked
 886   // up at the next animation step if the throbber is going.
 887   void SetNotWaitingForResponse() { waiting_for_response_ = false; }
 888
 889   // Navigation helpers --------------------------------------------------------
 890   //
 891   // These functions are helpers for Navigate() and DidNavigate().
 892
 893   // Handles post-navigation tasks in DidNavigate AFTER the entry has been
 894   // committed to the navigation controller. Note that the navigation entry is
 895   // not provided since it may be invalid/changed after being committed. The
 896   // current navigation entry is in the NavigationController at this point.
 897
 898   // If our controller was restored, update the max page ID associated with the
 899   // given RenderViewHost to be larger than the number of restored entries.
 900   // This is called in CreateRenderView before any navigations in the RenderView
 901   // have begun, to prevent any races in updating RenderView::next_page_id.
 902   void UpdateMaxPageIDIfNecessary(RenderViewHost* rvh);
 903
 904   // Saves the given title to the navigation entry and does associated work. It
 905   // will update history and the view for the new title, and also synthesize
 906   // titles for file URLs that have none (so we require that the URL of the
 907   // entry already be set).
 908   //
 909   // This is used as the backend for state updates, which include a new title,
 910   // or the dedicated set title message. It returns true if the new title is
 911   // different and was therefore updated.
 912   bool UpdateTitleForEntry(NavigationEntryImpl* entry,
 913                            const base::string16& title);
 914
 915   // Helper for CreateNewWidget/CreateNewFullscreenWidget.
 916   void CreateNewWidget(int render_process_id,
 917                        int route_id,
 918                        bool is_fullscreen,
 919                        blink::WebPopupType popup_type);
 920
 921   // Helper for ShowCreatedWidget/ShowCreatedFullscreenWidget.
 922   void ShowCreatedWidget(int route_id,
 923                          bool is_fullscreen,
 924                          const gfx::Rect& initial_rect);
 925
 926   // Finds the new RenderWidgetHost and returns it. Note that this can only be
 927   // called once as this call also removes it from the internal map.
 928   RenderWidgetHostView* GetCreatedWidget(int route_id);
 929
 930   // Finds the new WebContentsImpl by route_id, initializes it for
 931   // renderer-initiated creation, and returns it. Note that this can only be
 932   // called once as this call also removes it from the internal map.
 933   WebContentsImpl* GetCreatedWindow(int route_id);
 934
 935   // Tracking loading progress -------------------------------------------------
 936
 937   // Resets the tracking state of the current load progress.
 938   void ResetLoadProgressState();
 939
 940   // Notifies the delegate that the load progress was updated.
 941   void SendChangeLoadProgress();
 942
 943   // Misc non-view stuff -------------------------------------------------------
 944
 945   // Sets the history for a specified RenderViewHost to |history_length|
 946   // entries, with an offset of |history_offset|.
 947   void SetHistoryOffsetAndLengthForView(RenderViewHost* render_view_host,
 948                                         int history_offset,
 949                                         int history_length);
 950
 951   // Helper functions for sending notifications.
 952   void NotifyViewSwapped(RenderViewHost* old_host, RenderViewHost* new_host);
 953   void NotifyFrameSwapped(RenderFrameHost* old_host, RenderFrameHost* new_host);
 954   void NotifyDisconnected();
 955
 956   void SetEncoding(const std::string& encoding);
 957
 958   // TODO(creis): This should take in a FrameTreeNode to know which node's
 959   // render manager to return.  For now, we just return the root's.
 960   RenderFrameHostManager* GetRenderManager() const;
 961
 962   // Removes browser plugin embedder if there is one.
 963   void RemoveBrowserPluginEmbedder();
 964
 965   // Clear |render_frame_host|'s tracking entry for its power save blockers.
 966   void ClearPowerSaveBlockers(RenderFrameHost* render_frame_host);
 967
 968   // Clear tracking entries for all RenderFrameHosts, clears
 969   // |audio_power_save_blocker_| and |video_power_save_blocker_|.
 970   void ClearAllPowerSaveBlockers();
 971
 972   // Creates an audio or video power save blocker respectively.
 973   void CreateAudioPowerSaveBlocker();
 974   void CreateVideoPowerSaveBlocker();
 975
 976   // Releases the audio power save blockers if |active_audio_players_| is empty.
 977   // Likewise, releases the video power save blockers if |active_video_players_|
 978   // is empty.
 979   void MaybeReleasePowerSaveBlockers();
 980
 981   // Helper function to invoke WebContentsDelegate::GetSizeForNewRenderView().
 982   gfx::Size GetSizeForNewRenderView();
 983
 984   void OnFrameRemoved(RenderFrameHost* render_frame_host);
 985
 986   // Helper method that's called whenever |preferred_size_| or
 987   // |preferred_size_for_capture_| changes, to propagate the new value to the
 988   // |delegate_|.
 989   void OnPreferredSizeChanged(const gfx::Size& old_size);
 990
 991   // Helper methods for adding or removing player entries in |player_map| under
 992   // the key |render_frame_message_source_|.
 993   typedef std::vector<int64> PlayerList;
 994   typedef std::map<uintptr_t, PlayerList> ActiveMediaPlayerMap;
 995   void AddMediaPlayerEntry(int64 player_cookie,
 996                            ActiveMediaPlayerMap* player_map);
 997   void RemoveMediaPlayerEntry(int64 player_cookie,
 998                               ActiveMediaPlayerMap* player_map);
 999   // Removes all entries from |player_map| for |render_frame_host|.
1000   void RemoveAllMediaPlayerEntries(RenderFrameHost* render_frame_host,
1001                                    ActiveMediaPlayerMap* player_map);
1002
1003   // Data for core operation ---------------------------------------------------
1004
1005   // Delegate for notifying our owner about stuff. Not owned by us.
1006   WebContentsDelegate* delegate_;
1007
1008   // Handles the back/forward list and loading.
1009   NavigationControllerImpl controller_;
1010
1011   // The corresponding view.
1012   scoped_ptr<WebContentsView> view_;
1013
1014   // The view of the RVHD. Usually this is our WebContentsView implementation,
1015   // but if an embedder uses a different WebContentsView, they'll need to
1016   // provide this.
1017   RenderViewHostDelegateView* render_view_host_delegate_view_;
1018
1019   // Tracks created WebContentsImpl objects that have not been shown yet. They
1020   // are identified by the route ID passed to CreateNewWindow.
1021   typedef std::map<int, WebContentsImpl*> PendingContents;
1022   PendingContents pending_contents_;
1023
1024   // These maps hold on to the widgets that we created on behalf of the renderer
1025   // that haven't shown yet.
1026   typedef std::map<int, RenderWidgetHostView*> PendingWidgetViews;
1027   PendingWidgetViews pending_widget_views_;
1028
1029   typedef std::map<WebContentsImpl*, DestructionObserver*> DestructionObservers;
1030   DestructionObservers destruction_observers_;
1031
1032   // A list of observers notified when page state changes. Weak references.
1033   // This MUST be listed above frame_tree_ since at destruction time the
1034   // latter might cause RenderViewHost's destructor to call us and we might use
1035   // the observer list then.
1036   base::ObserverList<WebContentsObserver> observers_;
1037
1038   // True if this tab was opened by another tab. This is not unset if the opener
1039   // is closed.
1040   bool created_with_opener_;
1041
1042 #if defined(OS_WIN)
1043   gfx::NativeViewAccessible accessible_parent_;
1044 #endif
1045
1046   // Helper classes ------------------------------------------------------------
1047
1048   // Tracking variables and associated power save blockers for media playback.
1049   ActiveMediaPlayerMap active_audio_players_;
1050   ActiveMediaPlayerMap active_video_players_;
1051   scoped_ptr<PowerSaveBlocker> audio_power_save_blocker_;
1052   scoped_ptr<PowerSaveBlocker> video_power_save_blocker_;
1053
1054   // Tells whether this WebContents is actively producing sound.
1055   // Order is important: the |frame_tree_| destruction uses
1056   // |audio_state_provider_|.
1057   scoped_ptr<AudioStateProvider> audio_state_provider_;
1058
1059   // Manages the frame tree of the page and process swaps in each node.
1060   FrameTree frame_tree_;
1061
1062   // If this WebContents is part of a "tree of WebContents", then this contains
1063   // information about the structure.
1064   scoped_ptr<WebContentsTreeNode> node_;
1065
1066   // SavePackage, lazily created.
1067   scoped_refptr<SavePackage> save_package_;
1068
1069   // Data for loading state ----------------------------------------------------
1070
1071   // Indicates whether we're currently loading a resource.
1072   bool is_loading_;
1073
1074   // Indicates whether the current load is to a different document. Only valid
1075   // if is_loading_ is true.
1076   bool is_load_to_different_document_;
1077
1078   // Indicates if the tab is considered crashed.
1079   base::TerminationStatus crashed_status_;
1080   int crashed_error_code_;
1081
1082   // Whether this WebContents is waiting for a first-response for the
1083   // main resource of the page. This controls whether the throbber state is
1084   // "waiting" or "loading."
1085   bool waiting_for_response_;
1086
1087   // Map of SiteInstance ID to max page ID for this tab. A page ID is specific
1088   // to a given tab and SiteInstance, and must be valid for the lifetime of the
1089   // WebContentsImpl.
1090   std::map<int32, int32> max_page_ids_;
1091
1092   // The current load state and the URL associated with it.
1093   net::LoadStateWithParam load_state_;
1094   base::string16 load_state_host_;
1095
1096   base::TimeTicks loading_last_progress_update_;
1097
1098   // Upload progress, for displaying in the status bar.
1099   // Set to zero when there is no significant upload happening.
1100   uint64 upload_size_;
1101   uint64 upload_position_;
1102
1103   // Tracks that this WebContents needs to unblock requests to the renderer.
1104   // See ResumeLoadingCreatedWebContents.
1105   bool is_resume_pending_;
1106
1107   // Data for current page -----------------------------------------------------
1108
1109   // When a title cannot be taken from any entry, this title will be used.
1110   base::string16 page_title_when_no_navigation_entry_;
1111
1112   // When a navigation occurs, we record its contents MIME type. It can be
1113   // used to check whether we can do something for some special contents.
1114   std::string contents_mime_type_;
1115
1116   // The last reported character encoding, not canonicalized.
1117   std::string last_reported_encoding_;
1118
1119   // The canonicalized character encoding.
1120   std::string canonical_encoding_;
1121
1122   // True if this is a secure page which displayed insecure content.
1123   bool displayed_insecure_content_;
1124
1125   // Whether the initial empty page has been accessed by another page, making it
1126   // unsafe to show the pending URL. Usually false unless another window tries
1127   // to modify the blank page.  Always false after the first commit.
1128   bool has_accessed_initial_document_;
1129
1130   // The theme color for the underlying document as specified
1131   // by theme-color meta tag.
1132   SkColor theme_color_;
1133
1134   // The last published theme color.
1135   SkColor last_sent_theme_color_;
1136
1137   // Whether the first visually non-empty paint has occurred.
1138   bool did_first_visually_non_empty_paint_;
1139
1140   // Data for misc internal state ----------------------------------------------
1141
1142   // When > 0, the WebContents is currently being captured (e.g., for
1143   // screenshots or mirroring); and the underlying RenderWidgetHost should not
1144   // be told it is hidden.
1145   int capturer_count_;
1146
1147   // Tracks whether RWHV should be visible once capturer_count_ becomes zero.
1148   bool should_normally_be_visible_;
1149
1150   // See getter above.
1151   bool is_being_destroyed_;
1152
1153   // Indicates whether we should notify about disconnection of this
1154   // WebContentsImpl. This is used to ensure disconnection notifications only
1155   // happen if a connection notification has happened and that they happen only
1156   // once.
1157   bool notify_disconnection_;
1158
1159   // Pointer to the JavaScript dialog manager, lazily assigned. Used because the
1160   // delegate of this WebContentsImpl is nulled before its destructor is called.
1161   JavaScriptDialogManager* dialog_manager_;
1162
1163   // Set to true when there is an active "before unload" dialog.  When true,
1164   // we've forced the throbber to start in Navigate, and we need to remember to
1165   // turn it off in OnJavaScriptMessageBoxClosed if the navigation is canceled.
1166   bool is_showing_before_unload_dialog_;
1167
1168   // Settings that get passed to the renderer process.
1169   RendererPreferences renderer_preferences_;
1170
1171   // The time that this WebContents was last made active. The initial value is
1172   // the WebContents creation time.
1173   base::TimeTicks last_active_time_;
1174
1175   // See description above setter.
1176   bool closed_by_user_gesture_;
1177
1178   // Minimum/maximum zoom percent.
1179   int minimum_zoom_percent_;
1180   int maximum_zoom_percent_;
1181
1182   // The intrinsic size of the page.
1183   gfx::Size preferred_size_;
1184
1185   // The preferred size for content screen capture.  When |capturer_count_| > 0,
1186   // this overrides |preferred_size_|.
1187   gfx::Size preferred_size_for_capture_;
1188
1189 #if defined(OS_ANDROID)
1190   // Date time chooser opened by this tab.
1191   // Only used in Android since all other platforms use a multi field UI.
1192   scoped_ptr<DateTimeChooserAndroid> date_time_chooser_;
1193 #endif
1194
1195   // Holds information about a current color chooser dialog, if one is visible.
1196   struct ColorChooserInfo {
1197     ColorChooserInfo(int render_process_id,
1198                      int render_frame_id,
1199                      ColorChooser* chooser,
1200                      int identifier);
1201     ~ColorChooserInfo();
1202
1203     int render_process_id;
1204     int render_frame_id;
1205
1206     // Color chooser that was opened by this tab.
1207     scoped_ptr<ColorChooser> chooser;
1208
1209     // A unique identifier for the current color chooser.  Identifiers are
1210     // unique across a renderer process.  This avoids race conditions in
1211     // synchronizing the browser and renderer processes.  For example, if a
1212     // renderer closes one chooser and opens another, and simultaneously the
1213     // user picks a color in the first chooser, the IDs can be used to drop the
1214     // "chose a color" message rather than erroneously tell the renderer that
1215     // the user picked a color in the second chooser.
1216     int identifier;
1217   };
1218
1219   scoped_ptr<ColorChooserInfo> color_chooser_info_;
1220
1221   // Manages the embedder state for browser plugins, if this WebContents is an
1222   // embedder; NULL otherwise.
1223   scoped_ptr<BrowserPluginEmbedder> browser_plugin_embedder_;
1224   // Manages the guest state for browser plugin, if this WebContents is a guest;
1225   // NULL otherwise.
1226   scoped_ptr<BrowserPluginGuest> browser_plugin_guest_;
1227
1228 #if defined(ENABLE_PLUGINS)
1229   // Manages the whitelist of plugin content origins exempt from power saving.
1230   scoped_ptr<PluginContentOriginWhitelist> plugin_content_origin_whitelist_;
1231 #endif
1232
1233   // This must be at the end, or else we might get notifications and use other
1234   // member variables that are gone.
1235   NotificationRegistrar registrar_;
1236
1237   // Used during IPC message dispatching from the RenderView/RenderFrame so that
1238   // the handlers can get a pointer to the RVH through which the message was
1239   // received.
1240   RenderViewHost* render_view_message_source_;
1241   RenderFrameHost* render_frame_message_source_;
1242
1243   // All live RenderWidgetHostImpls that are created by this object and may
1244   // outlive it.
1245   std::set<RenderWidgetHostImpl*> created_widgets_;
1246
1247   // Routing id of the shown fullscreen widget or MSG_ROUTING_NONE otherwise.
1248   int fullscreen_widget_routing_id_;
1249
1250   // At the time the fullscreen widget was being shut down, did it have focus?
1251   // This is used to restore focus to the WebContentsView after both: 1) the
1252   // fullscreen widget is destroyed, and 2) the WebContentsDelegate has
1253   // completed making layout changes to effect an exit from fullscreen mode.
1254   bool fullscreen_widget_had_focus_at_shutdown_;
1255
1256   // Whether this WebContents is responsible for displaying a subframe in a
1257   // different process from its parent page.
1258   bool is_subframe_;
1259
1260   // When a new tab is created asynchronously, stores the OpenURLParams needed
1261   // to continue loading the page once the tab is ready.
1262   scoped_ptr<OpenURLParams> delayed_open_url_params_;
1263
1264   // Whether overscroll should be unconditionally disabled.
1265   bool force_disable_overscroll_content_;
1266
1267   // Whether the last JavaScript dialog shown was suppressed. Used for testing.
1268   bool last_dialog_suppressed_;
1269
1270   scoped_ptr<GeolocationServiceContext> geolocation_service_context_;
1271
1272   scoped_ptr<ScreenOrientationDispatcherHost>
1273       screen_orientation_dispatcher_host_;
1274
1275   scoped_ptr<ManifestManagerHost> manifest_manager_host_;
1276
1277   // The accessibility mode for all frames. This is queried when each frame
1278   // is created, and broadcast to all frames when it changes.
1279   AccessibilityMode accessibility_mode_;
1280
1281   // Created on-demand to mute all audio output from this WebContents.
1282   scoped_ptr<WebContentsAudioMuter> audio_muter_;
1283
1284   bool virtual_keyboard_requested_;
1285
1286 #if defined(ENABLE_BROWSER_CDMS)
1287   // Manages all the media player and CDM managers and forwards IPCs to them.
1288   scoped_ptr<MediaWebContentsObserver> media_web_contents_observer_;
1289 #endif
1290
1291   base::WeakPtrFactory<WebContentsImpl> loading_weak_factory_;
1292
1293   DISALLOW_COPY_AND_ASSIGN(WebContentsImpl);
1294 };
1295
1296 // Dangerous methods which should never be made part of the public API, so we
1297 // grant their use only to an explicit friend list (c++ attorney/client idiom).
1298 class CONTENT_EXPORT WebContentsImpl::FriendZone {
1299  private:
1300   friend class TestNavigationObserver;
1301   friend class WebContentsAddedObserver;
1302   friend class ContentBrowserSanityChecker;
1303
1304   FriendZone();  // Not instantiable.
1305
1306   // Adds/removes a callback called on creation of each new WebContents.
1307   static void AddCreatedCallbackForTesting(const CreatedCallback& callback);
1308   static void RemoveCreatedCallbackForTesting(const CreatedCallback& callback);
1309
1310   DISALLOW_COPY_AND_ASSIGN(FriendZone);
1311 };
1312
1313 }  // namespace content
1314
1315 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_