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