content/browser/renderer_host/render_view_host_impl.cc

   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 #include "content/browser/renderer_host/render_view_host_impl.h"
   6
   7 #include <set>
   8 #include <string>
   9 #include <utility>
  10 #include <vector>
  11
  12 #include "base/callback.h"
  13 #include "base/command_line.h"
  14 #include "base/i18n/rtl.h"
  15 #include "base/json/json_reader.h"
  16 #include "base/message_loop/message_loop.h"
  17 #include "base/metrics/field_trial.h"
  18 #include "base/metrics/histogram.h"
  19 #include "base/stl_util.h"
  20 #include "base/strings/string_util.h"
  21 #include "base/strings/utf_string_conversions.h"
  22 #include "base/sys_info.h"
  23 #include "base/time/time.h"
  24 #include "base/trace_event/trace_event.h"
  25 #include "base/values.h"
  26 #include "cc/base/switches.h"
  27 #include "content/browser/bad_message.h"
  28 #include "content/browser/child_process_security_policy_impl.h"
  29 #include "content/browser/dom_storage/session_storage_namespace_impl.h"
  30 #include "content/browser/frame_host/frame_tree.h"
  31 #include "content/browser/gpu/compositor_util.h"
  32 #include "content/browser/gpu/gpu_data_manager_impl.h"
  33 #include "content/browser/gpu/gpu_process_host.h"
  34 #include "content/browser/gpu/gpu_surface_tracker.h"
  35 #include "content/browser/host_zoom_map_impl.h"
  36 #include "content/browser/loader/resource_dispatcher_host_impl.h"
  37 #include "content/browser/renderer_host/dip_util.h"
  38 #include "content/browser/renderer_host/media/audio_renderer_host.h"
  39 #include "content/browser/renderer_host/render_process_host_impl.h"
  40 #include "content/browser/renderer_host/render_view_host_delegate.h"
  41 #include "content/browser/renderer_host/render_view_host_delegate_view.h"
  42 #include "content/browser/renderer_host/render_widget_host_view_base.h"
  43 #include "content/common/browser_plugin/browser_plugin_messages.h"
  44 #include "content/common/content_switches_internal.h"
  45 #include "content/common/drag_messages.h"
  46 #include "content/common/frame_messages.h"
  47 #include "content/common/input_messages.h"
  48 #include "content/common/inter_process_time_ticks_converter.h"
  49 #include "content/common/speech_recognition_messages.h"
  50 #include "content/common/swapped_out_messages.h"
  51 #include "content/common/view_messages.h"
  52 #include "content/public/browser/ax_event_notification_details.h"
  53 #include "content/public/browser/browser_accessibility_state.h"
  54 #include "content/public/browser/browser_context.h"
  55 #include "content/public/browser/browser_message_filter.h"
  56 #include "content/public/browser/content_browser_client.h"
  57 #include "content/public/browser/focused_node_details.h"
  58 #include "content/public/browser/native_web_keyboard_event.h"
  59 #include "content/public/browser/notification_details.h"
  60 #include "content/public/browser/notification_service.h"
  61 #include "content/public/browser/notification_types.h"
  62 #include "content/public/browser/render_frame_host.h"
  63 #include "content/public/browser/render_widget_host_iterator.h"
  64 #include "content/public/browser/storage_partition.h"
  65 #include "content/public/browser/user_metrics.h"
  66 #include "content/public/common/bindings_policy.h"
  67 #include "content/public/common/content_constants.h"
  68 #include "content/public/common/content_switches.h"
  69 #include "content/public/common/context_menu_params.h"
  70 #include "content/public/common/drop_data.h"
  71 #include "content/public/common/file_chooser_file_info.h"
  72 #include "content/public/common/file_chooser_params.h"
  73 #include "content/public/common/result_codes.h"
  74 #include "content/public/common/url_constants.h"
  75 #include "content/public/common/url_utils.h"
  76 #include "net/base/filename_util.h"
  77 #include "net/base/net_util.h"
  78 #include "net/base/network_change_notifier.h"
  79 #include "net/url_request/url_request_context_getter.h"
  80 #include "storage/browser/fileapi/isolated_context.h"
  81 #include "third_party/skia/include/core/SkBitmap.h"
  82 #include "ui/base/touch/touch_device.h"
  83 #include "ui/base/touch/touch_enabled.h"
  84 #include "ui/base/ui_base_switches.h"
  85 #include "ui/gfx/image/image_skia.h"
  86 #include "ui/gfx/native_widget_types.h"
  87 #include "ui/native_theme/native_theme_switches.h"
  88 #include "url/url_constants.h"
  89
  90 #if defined(OS_WIN)
  91 #include "base/win/win_util.h"
  92 #include "ui/gfx/platform_font_win.h"
  93 #include "ui/gfx/win/dpi.h"
  94 #endif
  95
  96 using base::TimeDelta;
  97 using blink::WebConsoleMessage;
  98 using blink::WebDragOperation;
  99 using blink::WebDragOperationNone;
 100 using blink::WebDragOperationsMask;
 101 using blink::WebInputEvent;
 102 using blink::WebMediaPlayerAction;
 103 using blink::WebPluginAction;
 104
 105 namespace content {
 106 namespace {
 107
 108 #if defined(OS_WIN)
 109
 110 const int kVirtualKeyboardDisplayWaitTimeoutMs = 100;
 111 const int kMaxVirtualKeyboardDisplayRetries = 5;
 112
 113 void DismissVirtualKeyboardTask() {
 114   static int virtual_keyboard_display_retries = 0;
 115   // If the virtual keyboard is not yet visible, then we execute the task again
 116   // waiting for it to show up.
 117   if (!base::win::DismissVirtualKeyboard()) {
 118     if (virtual_keyboard_display_retries < kMaxVirtualKeyboardDisplayRetries) {
 119       BrowserThread::PostDelayedTask(
 120           BrowserThread::UI, FROM_HERE,
 121           base::Bind(base::IgnoreResult(&DismissVirtualKeyboardTask)),
 122           TimeDelta::FromMilliseconds(kVirtualKeyboardDisplayWaitTimeoutMs));
 123       ++virtual_keyboard_display_retries;
 124     } else {
 125       virtual_keyboard_display_retries = 0;
 126     }
 127   }
 128 }
 129
 130 void GetWindowsSpecificPrefs(RendererPreferences* prefs) {
 131   NONCLIENTMETRICS_XP metrics = {0};
 132   base::win::GetNonClientMetrics(&metrics);
 133
 134   prefs->caption_font_family_name = metrics.lfCaptionFont.lfFaceName;
 135   prefs->caption_font_height = gfx::PlatformFontWin::GetFontSize(
 136       metrics.lfCaptionFont);
 137
 138   prefs->small_caption_font_family_name = metrics.lfSmCaptionFont.lfFaceName;
 139   prefs->small_caption_font_height = gfx::PlatformFontWin::GetFontSize(
 140       metrics.lfSmCaptionFont);
 141
 142   prefs->menu_font_family_name = metrics.lfMenuFont.lfFaceName;
 143   prefs->menu_font_height = gfx::PlatformFontWin::GetFontSize(
 144       metrics.lfMenuFont);
 145
 146   prefs->status_font_family_name = metrics.lfStatusFont.lfFaceName;
 147   prefs->status_font_height = gfx::PlatformFontWin::GetFontSize(
 148       metrics.lfStatusFont);
 149
 150   prefs->message_font_family_name = metrics.lfMessageFont.lfFaceName;
 151   prefs->message_font_height = gfx::PlatformFontWin::GetFontSize(
 152       metrics.lfMessageFont);
 153
 154   prefs->vertical_scroll_bar_width_in_dips =
 155       gfx::win::GetSystemMetricsInDIP(SM_CXVSCROLL);
 156   prefs->horizontal_scroll_bar_height_in_dips =
 157       gfx::win::GetSystemMetricsInDIP(SM_CYHSCROLL);
 158   prefs->arrow_bitmap_height_vertical_scroll_bar_in_dips =
 159       gfx::win::GetSystemMetricsInDIP(SM_CYVSCROLL);
 160   prefs->arrow_bitmap_width_horizontal_scroll_bar_in_dips =
 161       gfx::win::GetSystemMetricsInDIP(SM_CXHSCROLL);
 162 }
 163 #endif
 164
 165 }  // namespace
 166
 167 // static
 168 const int64 RenderViewHostImpl::kUnloadTimeoutMS = 1000;
 169
 170 ///////////////////////////////////////////////////////////////////////////////
 171 // RenderViewHost, public:
 172
 173 // static
 174 RenderViewHost* RenderViewHost::FromID(int render_process_id,
 175                                        int render_view_id) {
 176   return RenderViewHostImpl::FromID(render_process_id, render_view_id);
 177 }
 178
 179 // static
 180 RenderViewHost* RenderViewHost::From(RenderWidgetHost* rwh) {
 181   DCHECK(rwh->IsRenderView());
 182   return static_cast<RenderViewHostImpl*>(RenderWidgetHostImpl::From(rwh));
 183 }
 184
 185 ///////////////////////////////////////////////////////////////////////////////
 186 // RenderViewHostImpl, public:
 187
 188 // static
 189 RenderViewHostImpl* RenderViewHostImpl::FromID(int render_process_id,
 190                                                int render_view_id) {
 191   RenderWidgetHost* widget =
 192       RenderWidgetHost::FromID(render_process_id, render_view_id);
 193   if (!widget || !widget->IsRenderView())
 194     return NULL;
 195   return static_cast<RenderViewHostImpl*>(RenderWidgetHostImpl::From(widget));
 196 }
 197
 198 RenderViewHostImpl::RenderViewHostImpl(
 199     SiteInstance* instance,
 200     RenderViewHostDelegate* delegate,
 201     RenderWidgetHostDelegate* widget_delegate,
 202     int routing_id,
 203     int main_frame_routing_id,
 204     bool swapped_out,
 205     bool hidden,
 206     bool has_initialized_audio_host)
 207     : RenderWidgetHostImpl(widget_delegate,
 208                            instance->GetProcess(),
 209                            routing_id,
 210                            hidden),
 211       frames_ref_count_(0),
 212       delegate_(delegate),
 213       instance_(static_cast<SiteInstanceImpl*>(instance)),
 214       waiting_for_drag_context_response_(false),
 215       enabled_bindings_(0),
 216       page_id_(-1),
 217       is_active_(!swapped_out),
 218       is_swapped_out_(swapped_out),
 219       main_frame_routing_id_(main_frame_routing_id),
 220       is_waiting_for_close_ack_(false),
 221       sudden_termination_allowed_(false),
 222       render_view_termination_status_(base::TERMINATION_STATUS_STILL_RUNNING),
 223       virtual_keyboard_requested_(false),
 224       is_focused_element_editable_(false),
 225       updating_web_preferences_(false),
 226       weak_factory_(this) {
 227   DCHECK(instance_.get());
 228   CHECK(delegate_);  // http://crbug.com/82827
 229
 230   GetProcess()->AddObserver(this);
 231   GetProcess()->EnableSendQueue();
 232
 233   if (ResourceDispatcherHostImpl::Get()) {
 234     bool has_active_audio = false;
 235     if (has_initialized_audio_host) {
 236       scoped_refptr<AudioRendererHost> arh =
 237           static_cast<RenderProcessHostImpl*>(GetProcess())
 238               ->audio_renderer_host();
 239       if (arh.get())
 240         has_active_audio =
 241             arh->RenderFrameHasActiveAudio(main_frame_routing_id_);
 242     }
 243     BrowserThread::PostTask(
 244         BrowserThread::IO,
 245         FROM_HERE,
 246         base::Bind(&ResourceDispatcherHostImpl::OnRenderViewHostCreated,
 247                    base::Unretained(ResourceDispatcherHostImpl::Get()),
 248                    GetProcess()->GetID(),
 249                    GetRoutingID(),
 250                    !is_hidden(),
 251                    has_active_audio));
 252   }
 253 }
 254
 255 RenderViewHostImpl::~RenderViewHostImpl() {
 256   if (ResourceDispatcherHostImpl::Get()) {
 257     BrowserThread::PostTask(
 258         BrowserThread::IO, FROM_HERE,
 259         base::Bind(&ResourceDispatcherHostImpl::OnRenderViewHostDeleted,
 260                    base::Unretained(ResourceDispatcherHostImpl::Get()),
 261                    GetProcess()->GetID(), GetRoutingID()));
 262   }
 263
 264   delegate_->RenderViewDeleted(this);
 265   GetProcess()->RemoveObserver(this);
 266 }
 267
 268 RenderViewHostDelegate* RenderViewHostImpl::GetDelegate() const {
 269   return delegate_;
 270 }
 271
 272 SiteInstanceImpl* RenderViewHostImpl::GetSiteInstance() const {
 273   return instance_.get();
 274 }
 275
 276 bool RenderViewHostImpl::CreateRenderView(
 277     int opener_route_id,
 278     int proxy_route_id,
 279     int32 max_page_id,
 280     const FrameReplicationState& replicated_frame_state,
 281     bool window_was_created_with_opener) {
 282   TRACE_EVENT0("renderer_host,navigation",
 283                "RenderViewHostImpl::CreateRenderView");
 284   DCHECK(!IsRenderViewLive()) << "Creating view twice";
 285
 286   // The process may (if we're sharing a process with another host that already
 287   // initialized it) or may not (we have our own process or the old process
 288   // crashed) have been initialized. Calling Init multiple times will be
 289   // ignored, so this is safe.
 290   if (!GetProcess()->Init())
 291     return false;
 292   DCHECK(GetProcess()->HasConnection());
 293   DCHECK(GetProcess()->GetBrowserContext());
 294
 295   set_renderer_initialized(true);
 296
 297   GpuSurfaceTracker::Get()->SetSurfaceHandle(
 298       surface_id(), GetCompositingSurface());
 299
 300   // Ensure the RenderView starts with a next_page_id larger than any existing
 301   // page ID it might be asked to render.
 302   int32 next_page_id = 1;
 303   if (max_page_id > -1)
 304     next_page_id = max_page_id + 1;
 305
 306   ViewMsg_New_Params params;
 307   params.renderer_preferences =
 308       delegate_->GetRendererPrefs(GetProcess()->GetBrowserContext());
 309 #if defined(OS_WIN)
 310   GetWindowsSpecificPrefs(&params.renderer_preferences);
 311 #endif
 312   params.web_preferences = GetWebkitPreferences();
 313   params.view_id = GetRoutingID();
 314   params.main_frame_routing_id = main_frame_routing_id_;
 315   params.surface_id = surface_id();
 316   params.session_storage_namespace_id =
 317       delegate_->GetSessionStorageNamespace(instance_.get())->id();
 318   // Ensure the RenderView sets its opener correctly.
 319   params.opener_route_id = opener_route_id;
 320   params.swapped_out = !is_active_;
 321   params.replicated_frame_state = replicated_frame_state;
 322   params.proxy_routing_id = proxy_route_id;
 323   params.hidden = is_hidden();
 324   params.never_visible = delegate_->IsNeverVisible();
 325   params.window_was_created_with_opener = window_was_created_with_opener;
 326   params.next_page_id = next_page_id;
 327   params.enable_auto_resize = auto_resize_enabled();
 328   params.min_size = min_size_for_auto_resize();
 329   params.max_size = max_size_for_auto_resize();
 330   GetResizeParams(&params.initial_size);
 331
 332   if (!Send(new ViewMsg_New(params)))
 333     return false;
 334   SetInitialRenderSizeParams(params.initial_size);
 335
 336   // If the RWHV has not yet been set, the surface ID namespace will get
 337   // passed down by the call to SetView().
 338   if (view_) {
 339     Send(new ViewMsg_SetSurfaceIdNamespace(GetRoutingID(),
 340                                            view_->GetSurfaceIdNamespace()));
 341   }
 342
 343   // If it's enabled, tell the renderer to set up the Javascript bindings for
 344   // sending messages back to the browser.
 345   if (GetProcess()->IsForGuestsOnly())
 346     DCHECK_EQ(0, enabled_bindings_);
 347   Send(new ViewMsg_AllowBindings(GetRoutingID(), enabled_bindings_));
 348   // Let our delegate know that we created a RenderView.
 349   delegate_->RenderViewCreated(this);
 350
 351   // Since this method can create the main RenderFrame in the renderer process,
 352   // set the proper state on its corresponding RenderFrameHost.
 353   if (main_frame_routing_id_ != MSG_ROUTING_NONE) {
 354     RenderFrameHostImpl::FromID(GetProcess()->GetID(), main_frame_routing_id_)
 355         ->SetRenderFrameCreated(true);
 356   }
 357
 358   return true;
 359 }
 360
 361 bool RenderViewHostImpl::IsRenderViewLive() const {
 362   return GetProcess()->HasConnection() && renderer_initialized();
 363 }
 364
 365 void RenderViewHostImpl::SyncRendererPrefs() {
 366   RendererPreferences renderer_preferences =
 367       delegate_->GetRendererPrefs(GetProcess()->GetBrowserContext());
 368 #if defined(OS_WIN)
 369   GetWindowsSpecificPrefs(&renderer_preferences);
 370 #endif
 371   Send(new ViewMsg_SetRendererPrefs(GetRoutingID(), renderer_preferences));
 372 }
 373
 374 WebPreferences RenderViewHostImpl::ComputeWebkitPrefs() {
 375   TRACE_EVENT0("browser", "RenderViewHostImpl::GetWebkitPrefs");
 376   WebPreferences prefs;
 377
 378   const base::CommandLine& command_line =
 379       *base::CommandLine::ForCurrentProcess();
 380
 381   prefs.web_security_enabled =
 382       !command_line.HasSwitch(switches::kDisableWebSecurity);
 383   prefs.java_enabled =
 384       !command_line.HasSwitch(switches::kDisableJava);
 385
 386   prefs.remote_fonts_enabled =
 387       !command_line.HasSwitch(switches::kDisableRemoteFonts);
 388   prefs.application_cache_enabled = true;
 389   prefs.xss_auditor_enabled =
 390       !command_line.HasSwitch(switches::kDisableXSSAuditor);
 391   prefs.local_storage_enabled =
 392       !command_line.HasSwitch(switches::kDisableLocalStorage);
 393   prefs.databases_enabled =
 394       !command_line.HasSwitch(switches::kDisableDatabases);
 395 #if defined(OS_ANDROID)
 396   // WebAudio is enabled by default on x86 and ARM.
 397   prefs.webaudio_enabled =
 398       !command_line.HasSwitch(switches::kDisableWebAudio);
 399 #endif
 400
 401   prefs.experimental_webgl_enabled =
 402       GpuProcessHost::gpu_enabled() &&
 403       !command_line.HasSwitch(switches::kDisable3DAPIs) &&
 404       !command_line.HasSwitch(switches::kDisableExperimentalWebGL);
 405
 406   prefs.pepper_3d_enabled =
 407       !command_line.HasSwitch(switches::kDisablePepper3d);
 408
 409   prefs.flash_3d_enabled =
 410       GpuProcessHost::gpu_enabled() &&
 411       !command_line.HasSwitch(switches::kDisableFlash3d);
 412   prefs.flash_stage3d_enabled =
 413       GpuProcessHost::gpu_enabled() &&
 414       !command_line.HasSwitch(switches::kDisableFlashStage3d);
 415   prefs.flash_stage3d_baseline_enabled =
 416       GpuProcessHost::gpu_enabled() &&
 417       !command_line.HasSwitch(switches::kDisableFlashStage3d);
 418
 419   prefs.allow_file_access_from_file_urls =
 420       command_line.HasSwitch(switches::kAllowFileAccessFromFiles);
 421
 422   prefs.accelerated_2d_canvas_enabled =
 423       GpuProcessHost::gpu_enabled() &&
 424       !command_line.HasSwitch(switches::kDisableAccelerated2dCanvas);
 425   prefs.antialiased_2d_canvas_disabled =
 426       command_line.HasSwitch(switches::kDisable2dCanvasAntialiasing);
 427   prefs.antialiased_clips_2d_canvas_enabled =
 428       command_line.HasSwitch(switches::kEnable2dCanvasClipAntialiasing);
 429   prefs.accelerated_2d_canvas_msaa_sample_count =
 430       atoi(command_line.GetSwitchValueASCII(
 431       switches::kAcceleratedCanvas2dMSAASampleCount).c_str());
 432   prefs.text_blobs_enabled =
 433       !command_line.HasSwitch(switches::kDisableTextBlobs);
 434
 435   prefs.pinch_overlay_scrollbar_thickness = 10;
 436   prefs.use_solid_color_scrollbars = ui::IsOverlayScrollbarEnabled();
 437   prefs.invert_viewport_scroll_order =
 438       command_line.HasSwitch(switches::kInvertViewportScrollOrder);
 439
 440 #if defined(OS_ANDROID)
 441   // On Android, user gestures are normally required, unless that requirement
 442   // is disabled with a command-line switch or the equivalent field trial is
 443   // is set to "Enabled".
 444   const std::string autoplay_group_name = base::FieldTrialList::FindFullName(
 445       "MediaElementAutoplay");
 446   prefs.user_gesture_required_for_media_playback = !command_line.HasSwitch(
 447       switches::kDisableGestureRequirementForMediaPlayback) &&
 448           (autoplay_group_name.empty() || autoplay_group_name != "Enabled");
 449 #endif
 450
 451   prefs.touch_enabled = ui::AreTouchEventsEnabled();
 452   prefs.device_supports_touch = prefs.touch_enabled &&
 453       ui::IsTouchDevicePresent();
 454   prefs.available_pointer_types = ui::GetAvailablePointerTypes();
 455   prefs.primary_pointer_type = ui::GetPrimaryPointerType();
 456   prefs.available_hover_types = ui::GetAvailableHoverTypes();
 457   prefs.primary_hover_type = ui::GetPrimaryHoverType();
 458
 459 #if defined(OS_ANDROID)
 460   prefs.device_supports_mouse = false;
 461 #endif
 462
 463   prefs.pointer_events_max_touch_points = ui::MaxTouchPoints();
 464
 465   prefs.touch_adjustment_enabled =
 466       !command_line.HasSwitch(switches::kDisableTouchAdjustment);
 467
 468   const std::string slimming_group =
 469       base::FieldTrialList::FindFullName("SlimmingPaint");
 470   prefs.slimming_paint_enabled =
 471       (command_line.HasSwitch(switches::kEnableSlimmingPaint) ||
 472       !command_line.HasSwitch(switches::kDisableSlimmingPaint)) &&
 473       (slimming_group != "DisableSlimmingPaint");
 474 #if defined(OS_MACOSX) || defined(OS_CHROMEOS)
 475   bool default_enable_scroll_animator = true;
 476 #else
 477   bool default_enable_scroll_animator = false;
 478 #endif
 479   prefs.enable_scroll_animator = default_enable_scroll_animator;
 480   if (command_line.HasSwitch(switches::kEnableSmoothScrolling))
 481     prefs.enable_scroll_animator = true;
 482   if (command_line.HasSwitch(switches::kDisableSmoothScrolling))
 483     prefs.enable_scroll_animator = false;
 484
 485   // Certain GPU features might have been blacklisted.
 486   GpuDataManagerImpl::GetInstance()->UpdateRendererWebPrefs(&prefs);
 487
 488   if (ChildProcessSecurityPolicyImpl::GetInstance()->HasWebUIBindings(
 489           GetProcess()->GetID())) {
 490     prefs.loads_images_automatically = true;
 491     prefs.javascript_enabled = true;
 492   }
 493
 494   prefs.connection_type = net::NetworkChangeNotifier::GetConnectionType();
 495   prefs.is_online =
 496       prefs.connection_type != net::NetworkChangeNotifier::CONNECTION_NONE;
 497
 498   prefs.number_of_cpu_cores = base::SysInfo::NumberOfProcessors();
 499
 500   prefs.viewport_meta_enabled =
 501       command_line.HasSwitch(switches::kEnableViewportMeta);
 502
 503   prefs.viewport_enabled =
 504       command_line.HasSwitch(switches::kEnableViewport) ||
 505       prefs.viewport_meta_enabled;
 506
 507   prefs.main_frame_resizes_are_orientation_changes =
 508       command_line.HasSwitch(switches::kMainFrameResizesAreOrientationChanges);
 509
 510   prefs.image_color_profiles_enabled =
 511       command_line.HasSwitch(switches::kEnableImageColorProfiles);
 512
 513   prefs.spatial_navigation_enabled = command_line.HasSwitch(
 514       switches::kEnableSpatialNavigation);
 515
 516   prefs.disable_reading_from_canvas = command_line.HasSwitch(
 517       switches::kDisableReadingFromCanvas);
 518
 519   prefs.strict_mixed_content_checking = command_line.HasSwitch(
 520       switches::kEnableStrictMixedContentChecking);
 521
 522   prefs.strict_powerful_feature_restrictions = command_line.HasSwitch(
 523       switches::kEnableStrictPowerfulFeatureRestrictions);
 524
 525   prefs.v8_cache_options = GetV8CacheOptions();
 526
 527   GetContentClient()->browser()->OverrideWebkitPrefs(this, &prefs);
 528   return prefs;
 529 }
 530
 531 void RenderViewHostImpl::SuppressDialogsUntilSwapOut() {
 532   Send(new ViewMsg_SuppressDialogsUntilSwapOut(GetRoutingID()));
 533 }
 534
 535 void RenderViewHostImpl::ClosePage() {
 536   is_waiting_for_close_ack_ = true;
 537   StartHangMonitorTimeout(TimeDelta::FromMilliseconds(kUnloadTimeoutMS));
 538
 539   if (IsRenderViewLive()) {
 540     // Since we are sending an IPC message to the renderer, increase the event
 541     // count to prevent the hang monitor timeout from being stopped by input
 542     // event acknowledgements.
 543     increment_in_flight_event_count();
 544
 545     // TODO(creis): Should this be moved to Shutdown?  It may not be called for
 546     // RenderViewHosts that have been swapped out.
 547     NotificationService::current()->Notify(
 548         NOTIFICATION_RENDER_VIEW_HOST_WILL_CLOSE_RENDER_VIEW,
 549         Source<RenderViewHost>(this),
 550         NotificationService::NoDetails());
 551
 552     Send(new ViewMsg_ClosePage(GetRoutingID()));
 553   } else {
 554     // This RenderViewHost doesn't have a live renderer, so just skip the unload
 555     // event and close the page.
 556     ClosePageIgnoringUnloadEvents();
 557   }
 558 }
 559
 560 void RenderViewHostImpl::ClosePageIgnoringUnloadEvents() {
 561   StopHangMonitorTimeout();
 562   is_waiting_for_close_ack_ = false;
 563
 564   sudden_termination_allowed_ = true;
 565   delegate_->Close(this);
 566 }
 567
 568 #if defined(OS_ANDROID)
 569 void RenderViewHostImpl::ActivateNearestFindResult(int request_id,
 570                                                    float x,
 571                                                    float y) {
 572   Send(new InputMsg_ActivateNearestFindResult(GetRoutingID(),
 573                                               request_id, x, y));
 574 }
 575
 576 void RenderViewHostImpl::RequestFindMatchRects(int current_version) {
 577   Send(new ViewMsg_FindMatchRects(GetRoutingID(), current_version));
 578 }
 579 #endif
 580
 581 void RenderViewHostImpl::RenderProcessExited(RenderProcessHost* host,
 582                                              base::TerminationStatus status,
 583                                              int exit_code) {
 584   if (!renderer_initialized())
 585     return;
 586
 587   RenderWidgetHostImpl::RendererExited(status, exit_code);
 588   delegate_->RenderViewTerminated(
 589       this, static_cast<base::TerminationStatus>(status), exit_code);
 590 }
 591
 592 void RenderViewHostImpl::DragTargetDragEnter(
 593     const DropData& drop_data,
 594     const gfx::Point& client_pt,
 595     const gfx::Point& screen_pt,
 596     WebDragOperationsMask operations_allowed,
 597     int key_modifiers) {
 598   const int renderer_id = GetProcess()->GetID();
 599   ChildProcessSecurityPolicyImpl* policy =
 600       ChildProcessSecurityPolicyImpl::GetInstance();
 601
 602 #if defined(OS_CHROMEOS)
 603   // The externalfile:// scheme is used in Chrome OS to open external files in a
 604   // browser tab.
 605   if (drop_data.url.SchemeIs(content::kExternalFileScheme))
 606     policy->GrantRequestURL(renderer_id, drop_data.url);
 607 #endif
 608
 609   // The URL could have been cobbled together from any highlighted text string,
 610   // and can't be interpreted as a capability.
 611   DropData filtered_data(drop_data);
 612   GetProcess()->FilterURL(true, &filtered_data.url);
 613   if (drop_data.did_originate_from_renderer) {
 614     filtered_data.filenames.clear();
 615   }
 616
 617   // The filenames vector, on the other hand, does represent a capability to
 618   // access the given files.
 619   storage::IsolatedContext::FileInfoSet files;
 620   for (std::vector<ui::FileInfo>::iterator iter(
 621            filtered_data.filenames.begin());
 622        iter != filtered_data.filenames.end();
 623        ++iter) {
 624     // A dragged file may wind up as the value of an input element, or it
 625     // may be used as the target of a navigation instead.  We don't know
 626     // which will happen at this point, so generously grant both access
 627     // and request permissions to the specific file to cover both cases.
 628     // We do not give it the permission to request all file:// URLs.
 629
 630     // Make sure we have the same display_name as the one we register.
 631     if (iter->display_name.empty()) {
 632       std::string name;
 633       files.AddPath(iter->path, &name);
 634       iter->display_name = base::FilePath::FromUTF8Unsafe(name);
 635     } else {
 636       files.AddPathWithName(iter->path, iter->display_name.AsUTF8Unsafe());
 637     }
 638
 639     policy->GrantRequestSpecificFileURL(renderer_id,
 640                                         net::FilePathToFileURL(iter->path));
 641
 642     // If the renderer already has permission to read these paths, we don't need
 643     // to re-grant them. This prevents problems with DnD for files in the CrOS
 644     // file manager--the file manager already had read/write access to those
 645     // directories, but dragging a file would cause the read/write access to be
 646     // overwritten with read-only access, making them impossible to delete or
 647     // rename until the renderer was killed.
 648     if (!policy->CanReadFile(renderer_id, iter->path))
 649       policy->GrantReadFile(renderer_id, iter->path);
 650   }
 651
 652   storage::IsolatedContext* isolated_context =
 653       storage::IsolatedContext::GetInstance();
 654   DCHECK(isolated_context);
 655   std::string filesystem_id = isolated_context->RegisterDraggedFileSystem(
 656       files);
 657   if (!filesystem_id.empty()) {
 658     // Grant the permission iff the ID is valid.
 659     policy->GrantReadFileSystem(renderer_id, filesystem_id);
 660   }
 661   filtered_data.filesystem_id = base::UTF8ToUTF16(filesystem_id);
 662
 663   storage::FileSystemContext* file_system_context =
 664       BrowserContext::GetStoragePartition(GetProcess()->GetBrowserContext(),
 665                                           GetSiteInstance())
 666           ->GetFileSystemContext();
 667   for (size_t i = 0; i < filtered_data.file_system_files.size(); ++i) {
 668     storage::FileSystemURL file_system_url =
 669         file_system_context->CrackURL(filtered_data.file_system_files[i].url);
 670
 671     std::string register_name;
 672     std::string filesystem_id = isolated_context->RegisterFileSystemForPath(
 673         file_system_url.type(), file_system_url.filesystem_id(),
 674         file_system_url.path(), &register_name);
 675     policy->GrantReadFileSystem(renderer_id, filesystem_id);
 676
 677     // Note: We are using the origin URL provided by the sender here. It may be
 678     // different from the receiver's.
 679     filtered_data.file_system_files[i].url =
 680         GURL(storage::GetIsolatedFileSystemRootURIString(
 681                  file_system_url.origin(), filesystem_id, std::string())
 682                  .append(register_name));
 683   }
 684
 685   Send(new DragMsg_TargetDragEnter(GetRoutingID(), filtered_data, client_pt,
 686                                    screen_pt, operations_allowed,
 687                                    key_modifiers));
 688 }
 689
 690 void RenderViewHostImpl::DragTargetDragOver(
 691     const gfx::Point& client_pt,
 692     const gfx::Point& screen_pt,
 693     WebDragOperationsMask operations_allowed,
 694     int key_modifiers) {
 695   Send(new DragMsg_TargetDragOver(GetRoutingID(), client_pt, screen_pt,
 696                                   operations_allowed, key_modifiers));
 697 }
 698
 699 void RenderViewHostImpl::DragTargetDragLeave() {
 700   Send(new DragMsg_TargetDragLeave(GetRoutingID()));
 701 }
 702
 703 void RenderViewHostImpl::DragTargetDrop(
 704     const gfx::Point& client_pt,
 705     const gfx::Point& screen_pt,
 706     int key_modifiers) {
 707   Send(new DragMsg_TargetDrop(GetRoutingID(), client_pt, screen_pt,
 708                               key_modifiers));
 709 }
 710
 711 void RenderViewHostImpl::DragSourceEndedAt(
 712     int client_x, int client_y, int screen_x, int screen_y,
 713     WebDragOperation operation) {
 714   Send(new DragMsg_SourceEnded(GetRoutingID(),
 715                                gfx::Point(client_x, client_y),
 716                                gfx::Point(screen_x, screen_y),
 717                                operation));
 718 }
 719
 720 void RenderViewHostImpl::DragSourceSystemDragEnded() {
 721   Send(new DragMsg_SourceSystemDragEnded(GetRoutingID()));
 722 }
 723
 724 RenderFrameHost* RenderViewHostImpl::GetMainFrame() {
 725   return RenderFrameHost::FromID(GetProcess()->GetID(), main_frame_routing_id_);
 726 }
 727
 728 void RenderViewHostImpl::AllowBindings(int bindings_flags) {
 729   // Never grant any bindings to browser plugin guests.
 730   if (GetProcess()->IsForGuestsOnly()) {
 731     NOTREACHED() << "Never grant bindings to a guest process.";
 732     return;
 733   }
 734
 735   // Ensure we aren't granting WebUI bindings to a process that has already
 736   // been used for non-privileged views.
 737   if (bindings_flags & BINDINGS_POLICY_WEB_UI &&
 738       GetProcess()->HasConnection() &&
 739       !ChildProcessSecurityPolicyImpl::GetInstance()->HasWebUIBindings(
 740           GetProcess()->GetID())) {
 741     // This process has no bindings yet. Make sure it does not have more
 742     // than this single active view.
 743     // --single-process only has one renderer.
 744     if (GetProcess()->GetActiveViewCount() > 1 &&
 745         !base::CommandLine::ForCurrentProcess()->HasSwitch(
 746             switches::kSingleProcess))
 747       return;
 748   }
 749
 750   if (bindings_flags & BINDINGS_POLICY_WEB_UI) {
 751     ChildProcessSecurityPolicyImpl::GetInstance()->GrantWebUIBindings(
 752         GetProcess()->GetID());
 753   }
 754
 755   enabled_bindings_ |= bindings_flags;
 756   if (renderer_initialized())
 757     Send(new ViewMsg_AllowBindings(GetRoutingID(), enabled_bindings_));
 758 }
 759
 760 int RenderViewHostImpl::GetEnabledBindings() const {
 761   return enabled_bindings_;
 762 }
 763
 764 void RenderViewHostImpl::SetWebUIProperty(const std::string& name,
 765                                           const std::string& value) {
 766   // This is a sanity check before telling the renderer to enable the property.
 767   // It could lie and send the corresponding IPC messages anyway, but we will
 768   // not act on them if enabled_bindings_ doesn't agree. If we get here without
 769   // WebUI bindings, kill the renderer process.
 770   if (enabled_bindings_ & BINDINGS_POLICY_WEB_UI) {
 771     Send(new ViewMsg_SetWebUIProperty(GetRoutingID(), name, value));
 772   } else {
 773     RecordAction(
 774         base::UserMetricsAction("BindingsMismatchTerminate_RVH_WebUI"));
 775     GetProcess()->Shutdown(content::RESULT_CODE_KILLED, false);
 776   }
 777 }
 778
 779 void RenderViewHostImpl::GotFocus() {
 780   RenderWidgetHostImpl::GotFocus();  // Notifies the renderer it got focus.
 781
 782   RenderViewHostDelegateView* view = delegate_->GetDelegateView();
 783   if (view)
 784     view->GotFocus();
 785 }
 786
 787 void RenderViewHostImpl::LostCapture() {
 788   RenderWidgetHostImpl::LostCapture();
 789   delegate_->LostCapture();
 790 }
 791
 792 void RenderViewHostImpl::LostMouseLock() {
 793   RenderWidgetHostImpl::LostMouseLock();
 794   delegate_->LostMouseLock();
 795 }
 796
 797 void RenderViewHostImpl::SetInitialFocus(bool reverse) {
 798   Send(new ViewMsg_SetInitialFocus(GetRoutingID(), reverse));
 799 }
 800
 801 void RenderViewHostImpl::FilesSelectedInChooser(
 802     const std::vector<content::FileChooserFileInfo>& files,
 803     FileChooserParams::Mode permissions) {
 804   storage::FileSystemContext* const file_system_context =
 805       BrowserContext::GetStoragePartition(GetProcess()->GetBrowserContext(),
 806                                           GetSiteInstance())
 807           ->GetFileSystemContext();
 808   // Grant the security access requested to the given files.
 809   for (size_t i = 0; i < files.size(); ++i) {
 810     const content::FileChooserFileInfo& file = files[i];
 811     if (permissions == FileChooserParams::Save) {
 812       ChildProcessSecurityPolicyImpl::GetInstance()->GrantCreateReadWriteFile(
 813           GetProcess()->GetID(), file.file_path);
 814     } else {
 815       ChildProcessSecurityPolicyImpl::GetInstance()->GrantReadFile(
 816           GetProcess()->GetID(), file.file_path);
 817     }
 818     if (file.file_system_url.is_valid()) {
 819       ChildProcessSecurityPolicyImpl::GetInstance()->GrantReadFileSystem(
 820           GetProcess()->GetID(),
 821           file_system_context->CrackURL(file.file_system_url)
 822           .mount_filesystem_id());
 823     }
 824   }
 825   Send(new ViewMsg_RunFileChooserResponse(GetRoutingID(), files));
 826 }
 827
 828 void RenderViewHostImpl::DirectoryEnumerationFinished(
 829     int request_id,
 830     const std::vector<base::FilePath>& files) {
 831   // Grant the security access requested to the given files.
 832   for (std::vector<base::FilePath>::const_iterator file = files.begin();
 833        file != files.end(); ++file) {
 834     ChildProcessSecurityPolicyImpl::GetInstance()->GrantReadFile(
 835         GetProcess()->GetID(), *file);
 836   }
 837   Send(new ViewMsg_EnumerateDirectoryResponse(GetRoutingID(),
 838                                               request_id,
 839                                               files));
 840 }
 841
 842 void RenderViewHostImpl::SetIsLoading(bool is_loading) {
 843   if (ResourceDispatcherHostImpl::Get()) {
 844     BrowserThread::PostTask(
 845         BrowserThread::IO,
 846         FROM_HERE,
 847         base::Bind(&ResourceDispatcherHostImpl::OnRenderViewHostSetIsLoading,
 848                    base::Unretained(ResourceDispatcherHostImpl::Get()),
 849                    GetProcess()->GetID(),
 850                    GetRoutingID(),
 851                    is_loading));
 852   }
 853   RenderWidgetHostImpl::SetIsLoading(is_loading);
 854 }
 855
 856 void RenderViewHostImpl::LoadStateChanged(
 857     const GURL& url,
 858     const net::LoadStateWithParam& load_state,
 859     uint64 upload_position,
 860     uint64 upload_size) {
 861   delegate_->LoadStateChanged(url, load_state, upload_position, upload_size);
 862 }
 863
 864 bool RenderViewHostImpl::SuddenTerminationAllowed() const {
 865   return sudden_termination_allowed_ ||
 866       GetProcess()->SuddenTerminationAllowed();
 867 }
 868
 869 ///////////////////////////////////////////////////////////////////////////////
 870 // RenderViewHostImpl, IPC message handlers:
 871
 872 bool RenderViewHostImpl::OnMessageReceived(const IPC::Message& msg) {
 873   if (!BrowserMessageFilter::CheckCanDispatchOnUI(msg, this))
 874     return true;
 875
 876   // Filter out most IPC messages if this renderer is swapped out.
 877   // We still want to handle certain ACKs to keep our state consistent.
 878   if (is_swapped_out_) {
 879     if (!SwappedOutMessages::CanHandleWhileSwappedOut(msg)) {
 880       // If this is a synchronous message and we decided not to handle it,
 881       // we must send an error reply, or else the renderer will be stuck
 882       // and won't respond to future requests.
 883       if (msg.is_sync()) {
 884         IPC::Message* reply = IPC::SyncMessage::GenerateReply(&msg);
 885         reply->set_reply_error();
 886         Send(reply);
 887       }
 888       // Don't continue looking for someone to handle it.
 889       return true;
 890     }
 891   }
 892
 893   if (delegate_->OnMessageReceived(this, msg))
 894     return true;
 895
 896   bool handled = true;
 897   IPC_BEGIN_MESSAGE_MAP(RenderViewHostImpl, msg)
 898     IPC_MESSAGE_HANDLER(FrameHostMsg_RenderProcessGone, OnRenderProcessGone)
 899     IPC_MESSAGE_HANDLER(ViewHostMsg_ShowView, OnShowView)
 900     IPC_MESSAGE_HANDLER(ViewHostMsg_ShowWidget, OnShowWidget)
 901     IPC_MESSAGE_HANDLER(ViewHostMsg_ShowFullscreenWidget,
 902                         OnShowFullscreenWidget)
 903     IPC_MESSAGE_HANDLER(ViewHostMsg_RenderViewReady, OnRenderViewReady)
 904     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateState, OnUpdateState)
 905     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateTargetURL, OnUpdateTargetURL)
 906     IPC_MESSAGE_HANDLER(ViewHostMsg_Close, OnClose)
 907     IPC_MESSAGE_HANDLER(ViewHostMsg_RequestMove, OnRequestMove)
 908     IPC_MESSAGE_HANDLER(ViewHostMsg_DocumentAvailableInMainFrame,
 909                         OnDocumentAvailableInMainFrame)
 910     IPC_MESSAGE_HANDLER(ViewHostMsg_DidContentsPreferredSizeChange,
 911                         OnDidContentsPreferredSizeChange)
 912     IPC_MESSAGE_HANDLER(ViewHostMsg_RouteCloseEvent,
 913                         OnRouteCloseEvent)
 914     IPC_MESSAGE_HANDLER(DragHostMsg_StartDragging, OnStartDragging)
 915     IPC_MESSAGE_HANDLER(DragHostMsg_UpdateDragCursor, OnUpdateDragCursor)
 916     IPC_MESSAGE_HANDLER(DragHostMsg_TargetDrop_ACK, OnTargetDropACK)
 917     IPC_MESSAGE_HANDLER(ViewHostMsg_TakeFocus, OnTakeFocus)
 918     IPC_MESSAGE_HANDLER(ViewHostMsg_FocusedNodeChanged, OnFocusedNodeChanged)
 919     IPC_MESSAGE_HANDLER(ViewHostMsg_ClosePage_ACK, OnClosePageACK)
 920     IPC_MESSAGE_HANDLER(ViewHostMsg_DidZoomURL, OnDidZoomURL)
 921     IPC_MESSAGE_HANDLER(ViewHostMsg_PageScaleFactorIsOneChanged,
 922                         OnPageScaleFactorIsOneChanged)
 923     IPC_MESSAGE_HANDLER(ViewHostMsg_RunFileChooser, OnRunFileChooser)
 924     IPC_MESSAGE_HANDLER(ViewHostMsg_FocusedNodeTouched, OnFocusedNodeTouched)
 925     // Have the super handle all other messages.
 926     IPC_MESSAGE_UNHANDLED(
 927         handled = RenderWidgetHostImpl::OnMessageReceived(msg))
 928   IPC_END_MESSAGE_MAP()
 929
 930   return handled;
 931 }
 932
 933 void RenderViewHostImpl::Init() {
 934   RenderWidgetHostImpl::Init();
 935 }
 936
 937 void RenderViewHostImpl::Shutdown() {
 938   // We can't release the SessionStorageNamespace until our peer
 939   // in the renderer has wound down.
 940   if (GetProcess()->HasConnection()) {
 941     RenderProcessHostImpl::ReleaseOnCloseACK(
 942         GetProcess(),
 943         delegate_->GetSessionStorageNamespaceMap(),
 944         GetRoutingID());
 945   }
 946
 947   RenderWidgetHostImpl::Shutdown();
 948 }
 949
 950 void RenderViewHostImpl::WasHidden() {
 951   if (ResourceDispatcherHostImpl::Get()) {
 952     BrowserThread::PostTask(
 953         BrowserThread::IO, FROM_HERE,
 954         base::Bind(&ResourceDispatcherHostImpl::OnRenderViewHostWasHidden,
 955                    base::Unretained(ResourceDispatcherHostImpl::Get()),
 956                    GetProcess()->GetID(), GetRoutingID()));
 957   }
 958
 959   RenderWidgetHostImpl::WasHidden();
 960 }
 961
 962 void RenderViewHostImpl::WasShown(const ui::LatencyInfo& latency_info) {
 963   if (ResourceDispatcherHostImpl::Get()) {
 964     BrowserThread::PostTask(
 965         BrowserThread::IO, FROM_HERE,
 966         base::Bind(&ResourceDispatcherHostImpl::OnRenderViewHostWasShown,
 967                    base::Unretained(ResourceDispatcherHostImpl::Get()),
 968                    GetProcess()->GetID(), GetRoutingID()));
 969   }
 970
 971   RenderWidgetHostImpl::WasShown(latency_info);
 972 }
 973
 974 bool RenderViewHostImpl::IsRenderView() const {
 975   return true;
 976 }
 977
 978 void RenderViewHostImpl::CreateNewWindow(
 979     int route_id,
 980     int main_frame_route_id,
 981     const ViewHostMsg_CreateWindow_Params& params,
 982     SessionStorageNamespace* session_storage_namespace) {
 983   ViewHostMsg_CreateWindow_Params validated_params(params);
 984   GetProcess()->FilterURL(false, &validated_params.target_url);
 985   GetProcess()->FilterURL(false, &validated_params.opener_url);
 986   GetProcess()->FilterURL(true, &validated_params.opener_security_origin);
 987
 988   delegate_->CreateNewWindow(
 989       GetProcess()->GetID(), route_id, main_frame_route_id, validated_params,
 990       session_storage_namespace);
 991 }
 992
 993 void RenderViewHostImpl::CreateNewWidget(int route_id,
 994                                      blink::WebPopupType popup_type) {
 995   delegate_->CreateNewWidget(GetProcess()->GetID(), route_id, popup_type);
 996 }
 997
 998 void RenderViewHostImpl::CreateNewFullscreenWidget(int route_id) {
 999   delegate_->CreateNewFullscreenWidget(GetProcess()->GetID(), route_id);
1000 }
1001
1002 void RenderViewHostImpl::OnShowView(int route_id,
1003                                     WindowOpenDisposition disposition,
1004                                     const gfx::Rect& initial_rect,
1005                                     bool user_gesture) {
1006   if (is_active_) {
1007     delegate_->ShowCreatedWindow(
1008         route_id, disposition, initial_rect, user_gesture);
1009   }
1010   Send(new ViewMsg_Move_ACK(route_id));
1011 }
1012
1013 void RenderViewHostImpl::OnShowWidget(int route_id,
1014                                       const gfx::Rect& initial_rect) {
1015   if (is_active_)
1016     delegate_->ShowCreatedWidget(route_id, initial_rect);
1017   Send(new ViewMsg_Move_ACK(route_id));
1018 }
1019
1020 void RenderViewHostImpl::OnShowFullscreenWidget(int route_id) {
1021   if (is_active_)
1022     delegate_->ShowCreatedFullscreenWidget(route_id);
1023   Send(new ViewMsg_Move_ACK(route_id));
1024 }
1025
1026 void RenderViewHostImpl::OnRenderViewReady() {
1027   render_view_termination_status_ = base::TERMINATION_STATUS_STILL_RUNNING;
1028   SendScreenRects();
1029   WasResized();
1030   delegate_->RenderViewReady(this);
1031 }
1032
1033 void RenderViewHostImpl::OnRenderProcessGone(int status, int exit_code) {
1034   // Do nothing, otherwise RenderWidgetHostImpl will assume it is not a
1035   // RenderViewHostImpl and destroy itself.
1036   // TODO(nasko): Remove this hack once RenderViewHost and RenderWidgetHost are
1037   // decoupled.
1038 }
1039
1040 void RenderViewHostImpl::OnUpdateState(int32 page_id, const PageState& state) {
1041   // If the following DCHECK fails, you have encountered a tricky edge-case that
1042   // has evaded reproduction for a very long time. Please report what you were
1043   // doing on http://crbug.com/407376, whether or not you can reproduce the
1044   // failure.
1045   DCHECK_EQ(page_id, page_id_);
1046
1047   // Without this check, the renderer can trick the browser into using
1048   // filenames it can't access in a future session restore.
1049   if (!CanAccessFilesOfPageState(state)) {
1050     bad_message::ReceivedBadMessage(
1051         GetProcess(), bad_message::RVH_CAN_ACCESS_FILES_OF_PAGE_STATE);
1052     return;
1053   }
1054
1055   delegate_->UpdateState(this, page_id, state);
1056 }
1057
1058 void RenderViewHostImpl::OnUpdateTargetURL(const GURL& url) {
1059   if (is_active_)
1060     delegate_->UpdateTargetURL(this, url);
1061
1062   // Send a notification back to the renderer that we are ready to
1063   // receive more target urls.
1064   Send(new ViewMsg_UpdateTargetURL_ACK(GetRoutingID()));
1065 }
1066
1067 void RenderViewHostImpl::OnClose() {
1068   // If the renderer is telling us to close, it has already run the unload
1069   // events, and we can take the fast path.
1070   ClosePageIgnoringUnloadEvents();
1071 }
1072
1073 void RenderViewHostImpl::OnRequestMove(const gfx::Rect& pos) {
1074   if (is_active_)
1075     delegate_->RequestMove(pos);
1076   Send(new ViewMsg_Move_ACK(GetRoutingID()));
1077 }
1078
1079 void RenderViewHostImpl::OnDocumentAvailableInMainFrame(
1080     bool uses_temporary_zoom_level) {
1081   delegate_->DocumentAvailableInMainFrame(this);
1082
1083   if (!uses_temporary_zoom_level)
1084     return;
1085
1086   HostZoomMapImpl* host_zoom_map =
1087       static_cast<HostZoomMapImpl*>(HostZoomMap::Get(GetSiteInstance()));
1088   host_zoom_map->SetTemporaryZoomLevel(GetProcess()->GetID(),
1089                                        GetRoutingID(),
1090                                        host_zoom_map->GetDefaultZoomLevel());
1091 }
1092
1093 void RenderViewHostImpl::OnDidContentsPreferredSizeChange(
1094     const gfx::Size& new_size) {
1095   delegate_->UpdatePreferredSize(new_size);
1096 }
1097
1098 void RenderViewHostImpl::OnRenderAutoResized(const gfx::Size& new_size) {
1099   delegate_->ResizeDueToAutoResize(new_size);
1100 }
1101
1102 void RenderViewHostImpl::OnRouteCloseEvent() {
1103   // Have the delegate route this to the active RenderViewHost.
1104   delegate_->RouteCloseEvent(this);
1105 }
1106
1107 void RenderViewHostImpl::OnStartDragging(
1108     const DropData& drop_data,
1109     WebDragOperationsMask drag_operations_mask,
1110     const SkBitmap& bitmap,
1111     const gfx::Vector2d& bitmap_offset_in_dip,
1112     const DragEventSourceInfo& event_info) {
1113   RenderViewHostDelegateView* view = delegate_->GetDelegateView();
1114   if (!view)
1115     return;
1116
1117   DropData filtered_data(drop_data);
1118   RenderProcessHost* process = GetProcess();
1119   ChildProcessSecurityPolicyImpl* policy =
1120       ChildProcessSecurityPolicyImpl::GetInstance();
1121
1122   // Allow drag of Javascript URLs to enable bookmarklet drag to bookmark bar.
1123   if (!filtered_data.url.SchemeIs(url::kJavaScriptScheme))
1124     process->FilterURL(true, &filtered_data.url);
1125   process->FilterURL(false, &filtered_data.html_base_url);
1126   // Filter out any paths that the renderer didn't have access to. This prevents
1127   // the following attack on a malicious renderer:
1128   // 1. StartDragging IPC sent with renderer-specified filesystem paths that it
1129   //    doesn't have read permissions for.
1130   // 2. We initiate a native DnD operation.
1131   // 3. DnD operation immediately ends since mouse is not held down. DnD events
1132   //    still fire though, which causes read permissions to be granted to the
1133   //    renderer for any file paths in the drop.
1134   filtered_data.filenames.clear();
1135   for (std::vector<ui::FileInfo>::const_iterator it =
1136            drop_data.filenames.begin();
1137        it != drop_data.filenames.end();
1138        ++it) {
1139     if (policy->CanReadFile(GetProcess()->GetID(), it->path))
1140       filtered_data.filenames.push_back(*it);
1141   }
1142
1143   storage::FileSystemContext* file_system_context =
1144       BrowserContext::GetStoragePartition(GetProcess()->GetBrowserContext(),
1145                                           GetSiteInstance())
1146           ->GetFileSystemContext();
1147   filtered_data.file_system_files.clear();
1148   for (size_t i = 0; i < drop_data.file_system_files.size(); ++i) {
1149     storage::FileSystemURL file_system_url =
1150         file_system_context->CrackURL(drop_data.file_system_files[i].url);
1151     if (policy->CanReadFileSystemFile(GetProcess()->GetID(), file_system_url))
1152       filtered_data.file_system_files.push_back(drop_data.file_system_files[i]);
1153   }
1154
1155   float scale = GetScaleFactorForView(GetView());
1156   gfx::ImageSkia image(gfx::ImageSkiaRep(bitmap, scale));
1157   view->StartDragging(filtered_data, drag_operations_mask, image,
1158       bitmap_offset_in_dip, event_info);
1159 }
1160
1161 void RenderViewHostImpl::OnUpdateDragCursor(WebDragOperation current_op) {
1162   RenderViewHostDelegateView* view = delegate_->GetDelegateView();
1163   if (view)
1164     view->UpdateDragCursor(current_op);
1165 }
1166
1167 void RenderViewHostImpl::OnTargetDropACK() {
1168   NotificationService::current()->Notify(
1169       NOTIFICATION_RENDER_VIEW_HOST_DID_RECEIVE_DRAG_TARGET_DROP_ACK,
1170       Source<RenderViewHost>(this),
1171       NotificationService::NoDetails());
1172 }
1173
1174 void RenderViewHostImpl::OnTakeFocus(bool reverse) {
1175   RenderViewHostDelegateView* view = delegate_->GetDelegateView();
1176   if (view)
1177     view->TakeFocus(reverse);
1178 }
1179
1180 void RenderViewHostImpl::OnFocusedNodeChanged(
1181     bool is_editable_node,
1182     const gfx::Rect& node_bounds_in_viewport) {
1183   is_focused_element_editable_ = is_editable_node;
1184   if (view_)
1185     view_->FocusedNodeChanged(is_editable_node);
1186 #if defined(OS_WIN)
1187   if (!is_editable_node && virtual_keyboard_requested_) {
1188     virtual_keyboard_requested_ = false;
1189     delegate_->SetIsVirtualKeyboardRequested(false);
1190     BrowserThread::PostDelayedTask(
1191         BrowserThread::UI, FROM_HERE,
1192         base::Bind(base::IgnoreResult(&DismissVirtualKeyboardTask)),
1193         TimeDelta::FromMilliseconds(kVirtualKeyboardDisplayWaitTimeoutMs));
1194   }
1195 #endif
1196
1197   // Convert node_bounds to screen coordinates.
1198   gfx::Rect view_bounds_in_screen = view_->GetViewBounds();
1199   gfx::Point origin = node_bounds_in_viewport.origin();
1200   origin.Offset(view_bounds_in_screen.x(), view_bounds_in_screen.y());
1201   gfx::Rect node_bounds_in_screen(origin.x(), origin.y(),
1202                                   node_bounds_in_viewport.width(),
1203                                   node_bounds_in_viewport.height());
1204   FocusedNodeDetails details = {is_editable_node, node_bounds_in_screen};
1205   NotificationService::current()->Notify(NOTIFICATION_FOCUS_CHANGED_IN_PAGE,
1206                                          Source<RenderViewHost>(this),
1207                                          Details<FocusedNodeDetails>(&details));
1208 }
1209
1210 void RenderViewHostImpl::OnUserGesture() {
1211   delegate_->OnUserGesture();
1212 }
1213
1214 void RenderViewHostImpl::OnClosePageACK() {
1215   decrement_in_flight_event_count();
1216   ClosePageIgnoringUnloadEvents();
1217 }
1218
1219 void RenderViewHostImpl::NotifyRendererUnresponsive() {
1220   delegate_->RendererUnresponsive(this);
1221 }
1222
1223 void RenderViewHostImpl::NotifyRendererResponsive() {
1224   delegate_->RendererResponsive(this);
1225 }
1226
1227 void RenderViewHostImpl::RequestToLockMouse(bool user_gesture,
1228                                             bool last_unlocked_by_target) {
1229   delegate_->RequestToLockMouse(user_gesture, last_unlocked_by_target);
1230 }
1231
1232 bool RenderViewHostImpl::IsFullscreenGranted() const {
1233   return delegate_->IsFullscreenForCurrentTab();
1234 }
1235
1236 blink::WebDisplayMode RenderViewHostImpl::GetDisplayMode() const {
1237   return delegate_->GetDisplayMode();
1238 }
1239
1240 void RenderViewHostImpl::OnFocus() {
1241   // Note: We allow focus and blur from swapped out RenderViewHosts, even when
1242   // the active RenderViewHost is in a different BrowsingInstance (e.g., WebUI).
1243   delegate_->Activate();
1244 }
1245
1246 void RenderViewHostImpl::OnBlur() {
1247   delegate_->Deactivate();
1248 }
1249
1250 gfx::Rect RenderViewHostImpl::GetRootWindowResizerRect() const {
1251   return delegate_->GetRootWindowResizerRect();
1252 }
1253
1254 void RenderViewHostImpl::ForwardMouseEvent(
1255     const blink::WebMouseEvent& mouse_event) {
1256   RenderWidgetHostImpl::ForwardMouseEvent(mouse_event);
1257   if (mouse_event.type == WebInputEvent::MouseWheel && ignore_input_events())
1258     delegate_->OnIgnoredUIEvent();
1259 }
1260
1261 void RenderViewHostImpl::ForwardKeyboardEvent(
1262     const NativeWebKeyboardEvent& key_event) {
1263   if (ignore_input_events()) {
1264     if (key_event.type == WebInputEvent::RawKeyDown)
1265       delegate_->OnIgnoredUIEvent();
1266     return;
1267   }
1268   RenderWidgetHostImpl::ForwardKeyboardEvent(key_event);
1269 }
1270
1271 void RenderViewHostImpl::OnTextSurroundingSelectionResponse(
1272     const base::string16& content,
1273     size_t start_offset,
1274     size_t end_offset) {
1275   if (!view_)
1276     return;
1277   view_->OnTextSurroundingSelectionResponse(content, start_offset, end_offset);
1278 }
1279
1280 WebPreferences RenderViewHostImpl::GetWebkitPreferences() {
1281   if (!web_preferences_.get()) {
1282     OnWebkitPreferencesChanged();
1283   }
1284   return *web_preferences_;
1285 }
1286
1287 void RenderViewHostImpl::UpdateWebkitPreferences(const WebPreferences& prefs) {
1288   web_preferences_.reset(new WebPreferences(prefs));
1289   Send(new ViewMsg_UpdateWebPreferences(GetRoutingID(), prefs));
1290 }
1291
1292 void RenderViewHostImpl::OnWebkitPreferencesChanged() {
1293   // This is defensive code to avoid infinite loops due to code run inside
1294   // UpdateWebkitPreferences() accidentally updating more preferences and thus
1295   // calling back into this code. See crbug.com/398751 for one past example.
1296   if (updating_web_preferences_)
1297     return;
1298   updating_web_preferences_ = true;
1299   UpdateWebkitPreferences(ComputeWebkitPrefs());
1300   updating_web_preferences_ = false;
1301 }
1302
1303 void RenderViewHostImpl::ClearFocusedElement() {
1304   is_focused_element_editable_ = false;
1305   Send(new ViewMsg_ClearFocusedElement(GetRoutingID()));
1306 }
1307
1308 bool RenderViewHostImpl::IsFocusedElementEditable() {
1309   return is_focused_element_editable_;
1310 }
1311
1312 void RenderViewHostImpl::Zoom(PageZoom zoom) {
1313   Send(new ViewMsg_Zoom(GetRoutingID(), zoom));
1314 }
1315
1316 void RenderViewHostImpl::DisableScrollbarsForThreshold(const gfx::Size& size) {
1317   Send(new ViewMsg_DisableScrollbarsForSmallWindows(GetRoutingID(), size));
1318 }
1319
1320 void RenderViewHostImpl::EnablePreferredSizeMode() {
1321   Send(new ViewMsg_EnablePreferredSizeChangedMode(GetRoutingID()));
1322 }
1323
1324 void RenderViewHostImpl::EnableAutoResize(const gfx::Size& min_size,
1325                                           const gfx::Size& max_size) {
1326   SetAutoResize(true, min_size, max_size);
1327   Send(new ViewMsg_EnableAutoResize(GetRoutingID(), min_size, max_size));
1328 }
1329
1330 void RenderViewHostImpl::DisableAutoResize(const gfx::Size& new_size) {
1331   SetAutoResize(false, gfx::Size(), gfx::Size());
1332   Send(new ViewMsg_DisableAutoResize(GetRoutingID(), new_size));
1333   if (!new_size.IsEmpty())
1334     GetView()->SetSize(new_size);
1335 }
1336
1337 void RenderViewHostImpl::CopyImageAt(int x, int y) {
1338   Send(new ViewMsg_CopyImageAt(GetRoutingID(), x, y));
1339 }
1340
1341 void RenderViewHostImpl::SaveImageAt(int x, int y) {
1342   Send(new ViewMsg_SaveImageAt(GetRoutingID(), x, y));
1343 }
1344
1345 void RenderViewHostImpl::ExecuteMediaPlayerActionAtLocation(
1346   const gfx::Point& location, const blink::WebMediaPlayerAction& action) {
1347   Send(new ViewMsg_MediaPlayerActionAt(GetRoutingID(), location, action));
1348 }
1349
1350 void RenderViewHostImpl::ExecutePluginActionAtLocation(
1351   const gfx::Point& location, const blink::WebPluginAction& action) {
1352   Send(new ViewMsg_PluginActionAt(GetRoutingID(), location, action));
1353 }
1354
1355 void RenderViewHostImpl::NotifyMoveOrResizeStarted() {
1356   Send(new ViewMsg_MoveOrResizeStarted(GetRoutingID()));
1357 }
1358
1359 void RenderViewHostImpl::OnDidZoomURL(double zoom_level,
1360                                       const GURL& url) {
1361   HostZoomMapImpl* host_zoom_map =
1362       static_cast<HostZoomMapImpl*>(HostZoomMap::Get(GetSiteInstance()));
1363
1364   host_zoom_map->SetZoomLevelForView(GetProcess()->GetID(),
1365                                      GetRoutingID(),
1366                                      zoom_level,
1367                                      net::GetHostOrSpecFromURL(url));
1368 }
1369
1370 void RenderViewHostImpl::OnPageScaleFactorIsOneChanged(bool is_one) {
1371   if (!GetSiteInstance())
1372     return;
1373   HostZoomMapImpl* host_zoom_map =
1374       static_cast<HostZoomMapImpl*>(HostZoomMap::Get(GetSiteInstance()));
1375   if (!host_zoom_map)
1376     return;
1377   if (!GetProcess())
1378     return;
1379   host_zoom_map->SetPageScaleFactorIsOneForView(GetProcess()->GetID(),
1380                                                 GetRoutingID(), is_one);
1381 }
1382
1383 void RenderViewHostImpl::OnRunFileChooser(const FileChooserParams& params) {
1384   // Do not allow messages with absolute paths in them as this can permit a
1385   // renderer to coerce the browser to perform I/O on a renderer controlled
1386   // path.
1387   if (params.default_file_name != params.default_file_name.BaseName()) {
1388     bad_message::ReceivedBadMessage(GetProcess(),
1389                                     bad_message::RVH_FILE_CHOOSER_PATH);
1390     return;
1391   }
1392
1393   delegate_->RunFileChooser(this, params);
1394 }
1395
1396 void RenderViewHostImpl::OnFocusedNodeTouched(bool editable) {
1397 #if defined(OS_WIN)
1398   if (editable) {
1399     virtual_keyboard_requested_ = base::win::DisplayVirtualKeyboard();
1400     delegate_->SetIsVirtualKeyboardRequested(true);
1401   } else {
1402     virtual_keyboard_requested_ = false;
1403     delegate_->SetIsVirtualKeyboardRequested(false);
1404     base::win::DismissVirtualKeyboard();
1405   }
1406 #endif
1407 }
1408
1409 bool RenderViewHostImpl::CanAccessFilesOfPageState(
1410     const PageState& state) const {
1411   ChildProcessSecurityPolicyImpl* policy =
1412       ChildProcessSecurityPolicyImpl::GetInstance();
1413
1414   const std::vector<base::FilePath>& file_paths = state.GetReferencedFiles();
1415   for (const auto& file : file_paths) {
1416     if (!policy->CanReadFile(GetProcess()->GetID(), file))
1417       return false;
1418   }
1419   return true;
1420 }
1421
1422 void RenderViewHostImpl::GrantFileAccessFromPageState(const PageState& state) {
1423   ChildProcessSecurityPolicyImpl* policy =
1424       ChildProcessSecurityPolicyImpl::GetInstance();
1425
1426   const std::vector<base::FilePath>& file_paths = state.GetReferencedFiles();
1427   for (const auto& file : file_paths) {
1428     if (!policy->CanReadFile(GetProcess()->GetID(), file))
1429       policy->GrantReadFile(GetProcess()->GetID(), file);
1430   }
1431 }
1432
1433 void RenderViewHostImpl::SelectWordAroundCaret() {
1434   Send(new ViewMsg_SelectWordAroundCaret(GetRoutingID()));
1435 }
1436
1437 }  // namespace content