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     int32 routing_id,
 203     int32 surface_id,
 204     int32 main_frame_routing_id,
 205     bool swapped_out,
 206     bool hidden,
 207     bool has_initialized_audio_host)
 208     : RenderWidgetHostImpl(widget_delegate,
 209                            instance->GetProcess(),
 210                            routing_id,
 211                            surface_id,
 212                            hidden),
 213       frames_ref_count_(0),
 214       delegate_(delegate),
 215       instance_(static_cast<SiteInstanceImpl*>(instance)),
 216       waiting_for_drag_context_response_(false),
 217       enabled_bindings_(0),
 218       page_id_(-1),
 219       nav_entry_id_(0),
 220       is_active_(!swapped_out),
 221       is_swapped_out_(swapped_out),
 222       main_frame_routing_id_(main_frame_routing_id),
 223       is_waiting_for_close_ack_(false),
 224       sudden_termination_allowed_(false),
 225       render_view_termination_status_(base::TERMINATION_STATUS_STILL_RUNNING),
 226       virtual_keyboard_requested_(false),
 227       is_focused_element_editable_(false),
 228       updating_web_preferences_(false),
 229       weak_factory_(this) {
 230   DCHECK(instance_.get());
 231   CHECK(delegate_);  // http://crbug.com/82827
 232
 233   GetProcess()->AddObserver(this);
 234   GetProcess()->EnableSendQueue();
 235
 236   if (ResourceDispatcherHostImpl::Get()) {
 237     bool has_active_audio = false;
 238     if (has_initialized_audio_host) {
 239       scoped_refptr<AudioRendererHost> arh =
 240           static_cast<RenderProcessHostImpl*>(GetProcess())
 241               ->audio_renderer_host();
 242       if (arh.get())
 243         has_active_audio =
 244             arh->RenderFrameHasActiveAudio(main_frame_routing_id_);
 245     }
 246     BrowserThread::PostTask(
 247         BrowserThread::IO,
 248         FROM_HERE,
 249         base::Bind(&ResourceDispatcherHostImpl::OnRenderViewHostCreated,
 250                    base::Unretained(ResourceDispatcherHostImpl::Get()),
 251                    GetProcess()->GetID(),
 252                    GetRoutingID(),
 253                    !is_hidden(),
 254                    has_active_audio));
 255   }
 256 }
 257
 258 RenderViewHostImpl::~RenderViewHostImpl() {
 259   if (ResourceDispatcherHostImpl::Get()) {
 260     BrowserThread::PostTask(
 261         BrowserThread::IO, FROM_HERE,
 262         base::Bind(&ResourceDispatcherHostImpl::OnRenderViewHostDeleted,
 263                    base::Unretained(ResourceDispatcherHostImpl::Get()),
 264                    GetProcess()->GetID(), GetRoutingID()));
 265   }
 266
 267   delegate_->RenderViewDeleted(this);
 268   GetProcess()->RemoveObserver(this);
 269 }
 270
 271 RenderViewHostDelegate* RenderViewHostImpl::GetDelegate() const {
 272   return delegate_;
 273 }
 274
 275 SiteInstanceImpl* RenderViewHostImpl::GetSiteInstance() const {
 276   return instance_.get();
 277 }
 278
 279 bool RenderViewHostImpl::CreateRenderView(
 280     int opener_frame_route_id,
 281     int proxy_route_id,
 282     int32 max_page_id,
 283     const FrameReplicationState& replicated_frame_state,
 284     bool window_was_created_with_opener) {
 285   TRACE_EVENT0("renderer_host,navigation",
 286                "RenderViewHostImpl::CreateRenderView");
 287   DCHECK(!IsRenderViewLive()) << "Creating view twice";
 288
 289   // The process may (if we're sharing a process with another host that already
 290   // initialized it) or may not (we have our own process or the old process
 291   // crashed) have been initialized. Calling Init multiple times will be
 292   // ignored, so this is safe.
 293   if (!GetProcess()->Init())
 294     return false;
 295   DCHECK(GetProcess()->HasConnection());
 296   DCHECK(GetProcess()->GetBrowserContext());
 297
 298   set_renderer_initialized(true);
 299
 300   GpuSurfaceTracker::Get()->SetSurfaceHandle(
 301       surface_id(), GetCompositingSurface());
 302
 303   // Ensure the RenderView starts with a next_page_id larger than any existing
 304   // page ID it might be asked to render.
 305   int32 next_page_id = 1;
 306   if (max_page_id > -1)
 307     next_page_id = max_page_id + 1;
 308
 309   ViewMsg_New_Params params;
 310   params.renderer_preferences =
 311       delegate_->GetRendererPrefs(GetProcess()->GetBrowserContext());
 312 #if defined(OS_WIN)
 313   GetWindowsSpecificPrefs(&params.renderer_preferences);
 314 #endif
 315   params.web_preferences = GetWebkitPreferences();
 316   params.view_id = GetRoutingID();
 317   params.main_frame_routing_id = main_frame_routing_id_;
 318   params.surface_id = surface_id();
 319   params.session_storage_namespace_id =
 320       delegate_->GetSessionStorageNamespace(instance_.get())->id();
 321   // Ensure the RenderView sets its opener correctly.
 322   params.opener_frame_route_id = opener_frame_route_id;
 323   params.swapped_out = !is_active_;
 324   params.replicated_frame_state = replicated_frame_state;
 325   params.proxy_routing_id = proxy_route_id;
 326   params.hidden = is_hidden();
 327   params.never_visible = delegate_->IsNeverVisible();
 328   params.window_was_created_with_opener = window_was_created_with_opener;
 329   params.next_page_id = next_page_id;
 330   params.enable_auto_resize = auto_resize_enabled();
 331   params.min_size = min_size_for_auto_resize();
 332   params.max_size = max_size_for_auto_resize();
 333   GetResizeParams(&params.initial_size);
 334
 335   if (!Send(new ViewMsg_New(params)))
 336     return false;
 337   SetInitialRenderSizeParams(params.initial_size);
 338
 339   // If the RWHV has not yet been set, the surface ID namespace will get
 340   // passed down by the call to SetView().
 341   if (view_) {
 342     Send(new ViewMsg_SetSurfaceIdNamespace(GetRoutingID(),
 343                                            view_->GetSurfaceIdNamespace()));
 344   }
 345
 346   // If it's enabled, tell the renderer to set up the Javascript bindings for
 347   // sending messages back to the browser.
 348   if (GetProcess()->IsForGuestsOnly())
 349     DCHECK_EQ(0, enabled_bindings_);
 350   Send(new ViewMsg_AllowBindings(GetRoutingID(), enabled_bindings_));
 351   // Let our delegate know that we created a RenderView.
 352   delegate_->RenderViewCreated(this);
 353
 354   // Since this method can create the main RenderFrame in the renderer process,
 355   // set the proper state on its corresponding RenderFrameHost.
 356   if (main_frame_routing_id_ != MSG_ROUTING_NONE) {
 357     RenderFrameHostImpl::FromID(GetProcess()->GetID(), main_frame_routing_id_)
 358         ->SetRenderFrameCreated(true);
 359   }
 360
 361   return true;
 362 }
 363
 364 bool RenderViewHostImpl::IsRenderViewLive() const {
 365   return GetProcess()->HasConnection() && renderer_initialized();
 366 }
 367
 368 void RenderViewHostImpl::SyncRendererPrefs() {
 369   RendererPreferences renderer_preferences =
 370       delegate_->GetRendererPrefs(GetProcess()->GetBrowserContext());
 371 #if defined(OS_WIN)
 372   GetWindowsSpecificPrefs(&renderer_preferences);
 373 #endif
 374   Send(new ViewMsg_SetRendererPrefs(GetRoutingID(), renderer_preferences));
 375 }
 376
 377 WebPreferences RenderViewHostImpl::ComputeWebkitPrefs() {
 378   TRACE_EVENT0("browser", "RenderViewHostImpl::GetWebkitPrefs");
 379   WebPreferences prefs;
 380
 381   const base::CommandLine& command_line =
 382       *base::CommandLine::ForCurrentProcess();
 383
 384   prefs.web_security_enabled =
 385       !command_line.HasSwitch(switches::kDisableWebSecurity);
 386
 387   prefs.remote_fonts_enabled =
 388       !command_line.HasSwitch(switches::kDisableRemoteFonts);
 389   prefs.application_cache_enabled = true;
 390   prefs.xss_auditor_enabled =
 391       !command_line.HasSwitch(switches::kDisableXSSAuditor);
 392   prefs.local_storage_enabled =
 393       !command_line.HasSwitch(switches::kDisableLocalStorage);
 394   prefs.databases_enabled =
 395       !command_line.HasSwitch(switches::kDisableDatabases);
 396 #if defined(OS_ANDROID)
 397   // WebAudio is enabled by default on x86 and ARM.
 398   prefs.webaudio_enabled =
 399       !command_line.HasSwitch(switches::kDisableWebAudio);
 400 #endif
 401
 402   prefs.experimental_webgl_enabled =
 403       GpuProcessHost::gpu_enabled() &&
 404       !command_line.HasSwitch(switches::kDisable3DAPIs) &&
 405       !command_line.HasSwitch(switches::kDisableExperimentalWebGL);
 406
 407   prefs.pepper_3d_enabled =
 408       !command_line.HasSwitch(switches::kDisablePepper3d);
 409
 410   prefs.flash_3d_enabled =
 411       GpuProcessHost::gpu_enabled() &&
 412       !command_line.HasSwitch(switches::kDisableFlash3d);
 413   prefs.flash_stage3d_enabled =
 414       GpuProcessHost::gpu_enabled() &&
 415       !command_line.HasSwitch(switches::kDisableFlashStage3d);
 416   prefs.flash_stage3d_baseline_enabled =
 417       GpuProcessHost::gpu_enabled() &&
 418       !command_line.HasSwitch(switches::kDisableFlashStage3d);
 419
 420   prefs.allow_file_access_from_file_urls =
 421       command_line.HasSwitch(switches::kAllowFileAccessFromFiles);
 422
 423   prefs.accelerated_2d_canvas_enabled =
 424       GpuProcessHost::gpu_enabled() &&
 425       !command_line.HasSwitch(switches::kDisableAccelerated2dCanvas);
 426   prefs.antialiased_2d_canvas_disabled =
 427       command_line.HasSwitch(switches::kDisable2dCanvasAntialiasing);
 428   prefs.antialiased_clips_2d_canvas_enabled =
 429       command_line.HasSwitch(switches::kEnable2dCanvasClipAntialiasing);
 430   prefs.accelerated_2d_canvas_msaa_sample_count =
 431       atoi(command_line.GetSwitchValueASCII(
 432       switches::kAcceleratedCanvas2dMSAASampleCount).c_str());
 433
 434   prefs.pinch_overlay_scrollbar_thickness = 10;
 435   prefs.use_solid_color_scrollbars = ui::IsOverlayScrollbarEnabled();
 436   prefs.invert_viewport_scroll_order =
 437       command_line.HasSwitch(switches::kInvertViewportScrollOrder);
 438
 439 #if defined(OS_ANDROID)
 440   // On Android, user gestures are normally required, unless that requirement
 441   // is disabled with a command-line switch or the equivalent field trial is
 442   // is set to "Enabled".
 443   const std::string autoplay_group_name = base::FieldTrialList::FindFullName(
 444       "MediaElementAutoplay");
 445   prefs.user_gesture_required_for_media_playback = !command_line.HasSwitch(
 446       switches::kDisableGestureRequirementForMediaPlayback) &&
 447           (autoplay_group_name.empty() || autoplay_group_name != "Enabled");
 448 #endif
 449
 450   prefs.touch_enabled = ui::AreTouchEventsEnabled();
 451   prefs.device_supports_touch = prefs.touch_enabled &&
 452       ui::IsTouchDevicePresent();
 453   prefs.available_pointer_types = ui::GetAvailablePointerTypes();
 454   prefs.primary_pointer_type = ui::GetPrimaryPointerType();
 455   prefs.available_hover_types = ui::GetAvailableHoverTypes();
 456   prefs.primary_hover_type = ui::GetPrimaryHoverType();
 457
 458 #if defined(OS_ANDROID)
 459   prefs.device_supports_mouse = false;
 460 #endif
 461
 462   prefs.pointer_events_max_touch_points = ui::MaxTouchPoints();
 463
 464   prefs.touch_adjustment_enabled =
 465       !command_line.HasSwitch(switches::kDisableTouchAdjustment);
 466
 467   const std::string slimming_group =
 468       base::FieldTrialList::FindFullName("SlimmingPaint");
 469   prefs.slimming_paint_enabled =
 470       (command_line.HasSwitch(switches::kEnableSlimmingPaint) ||
 471       !command_line.HasSwitch(switches::kDisableSlimmingPaint)) &&
 472       (slimming_group != "DisableSlimmingPaint");
 473   prefs.slimming_paint_v2_enabled =
 474       prefs.slimming_paint_enabled &&
 475       command_line.HasSwitch(switches::kEnableSlimmingPaintV2);
 476
 477 #if defined(OS_MACOSX) || defined(OS_CHROMEOS)
 478   bool default_enable_scroll_animator = true;
 479 #else
 480   bool default_enable_scroll_animator = false;
 481 #endif
 482   prefs.enable_scroll_animator = default_enable_scroll_animator;
 483   if (command_line.HasSwitch(switches::kEnableSmoothScrolling))
 484     prefs.enable_scroll_animator = true;
 485   if (command_line.HasSwitch(switches::kDisableSmoothScrolling))
 486     prefs.enable_scroll_animator = false;
 487
 488   // Certain GPU features might have been blacklisted.
 489   GpuDataManagerImpl::GetInstance()->UpdateRendererWebPrefs(&prefs);
 490
 491   if (ChildProcessSecurityPolicyImpl::GetInstance()->HasWebUIBindings(
 492           GetProcess()->GetID())) {
 493     prefs.loads_images_automatically = true;
 494     prefs.javascript_enabled = true;
 495   }
 496
 497   prefs.connection_type = net::NetworkChangeNotifier::GetConnectionType();
 498   prefs.is_online =
 499       prefs.connection_type != net::NetworkChangeNotifier::CONNECTION_NONE;
 500
 501   prefs.number_of_cpu_cores = base::SysInfo::NumberOfProcessors();
 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   const std::string blockable_mixed_content_group =
 526       base::FieldTrialList::FindFullName("BlockableMixedContent");
 527   prefs.strictly_block_blockable_mixed_content =
 528       blockable_mixed_content_group == "StrictlyBlockBlockableMixedContent";
 529
 530   const std::string plugin_mixed_content_status =
 531       base::FieldTrialList::FindFullName("PluginMixedContentStatus");
 532   prefs.block_mixed_plugin_content =
 533       plugin_mixed_content_status == "BlockableMixedContent";
 534
 535   prefs.v8_cache_options = GetV8CacheOptions();
 536
 537   GetContentClient()->browser()->OverrideWebkitPrefs(this, &prefs);
 538   return prefs;
 539 }
 540
 541 void RenderViewHostImpl::SuppressDialogsUntilSwapOut() {
 542   Send(new ViewMsg_SuppressDialogsUntilSwapOut(GetRoutingID()));
 543 }
 544
 545 void RenderViewHostImpl::ClosePage() {
 546   is_waiting_for_close_ack_ = true;
 547   StartHangMonitorTimeout(TimeDelta::FromMilliseconds(kUnloadTimeoutMS));
 548
 549   if (IsRenderViewLive()) {
 550     // Since we are sending an IPC message to the renderer, increase the event
 551     // count to prevent the hang monitor timeout from being stopped by input
 552     // event acknowledgements.
 553     increment_in_flight_event_count();
 554
 555     // TODO(creis): Should this be moved to Shutdown?  It may not be called for
 556     // RenderViewHosts that have been swapped out.
 557     NotificationService::current()->Notify(
 558         NOTIFICATION_RENDER_VIEW_HOST_WILL_CLOSE_RENDER_VIEW,
 559         Source<RenderViewHost>(this),
 560         NotificationService::NoDetails());
 561
 562     Send(new ViewMsg_ClosePage(GetRoutingID()));
 563   } else {
 564     // This RenderViewHost doesn't have a live renderer, so just skip the unload
 565     // event and close the page.
 566     ClosePageIgnoringUnloadEvents();
 567   }
 568 }
 569
 570 void RenderViewHostImpl::ClosePageIgnoringUnloadEvents() {
 571   StopHangMonitorTimeout();
 572   is_waiting_for_close_ack_ = false;
 573
 574   sudden_termination_allowed_ = true;
 575   delegate_->Close(this);
 576 }
 577
 578 #if defined(OS_ANDROID)
 579 void RenderViewHostImpl::ActivateNearestFindResult(int request_id,
 580                                                    float x,
 581                                                    float y) {
 582   Send(new InputMsg_ActivateNearestFindResult(GetRoutingID(),
 583                                               request_id, x, y));
 584 }
 585
 586 void RenderViewHostImpl::RequestFindMatchRects(int current_version) {
 587   Send(new ViewMsg_FindMatchRects(GetRoutingID(), current_version));
 588 }
 589 #endif
 590
 591 void RenderViewHostImpl::RenderProcessExited(RenderProcessHost* host,
 592                                              base::TerminationStatus status,
 593                                              int exit_code) {
 594   if (!renderer_initialized())
 595     return;
 596
 597   RenderWidgetHostImpl::RendererExited(status, exit_code);
 598   delegate_->RenderViewTerminated(this, status, exit_code);
 599 }
 600
 601 void RenderViewHostImpl::DragTargetDragEnter(
 602     const DropData& drop_data,
 603     const gfx::Point& client_pt,
 604     const gfx::Point& screen_pt,
 605     WebDragOperationsMask operations_allowed,
 606     int key_modifiers) {
 607   const int renderer_id = GetProcess()->GetID();
 608   ChildProcessSecurityPolicyImpl* policy =
 609       ChildProcessSecurityPolicyImpl::GetInstance();
 610
 611 #if defined(OS_CHROMEOS)
 612   // The externalfile:// scheme is used in Chrome OS to open external files in a
 613   // browser tab.
 614   if (drop_data.url.SchemeIs(content::kExternalFileScheme))
 615     policy->GrantRequestURL(renderer_id, drop_data.url);
 616 #endif
 617
 618   // The URL could have been cobbled together from any highlighted text string,
 619   // and can't be interpreted as a capability.
 620   DropData filtered_data(drop_data);
 621   GetProcess()->FilterURL(true, &filtered_data.url);
 622   if (drop_data.did_originate_from_renderer) {
 623     filtered_data.filenames.clear();
 624   }
 625
 626   // The filenames vector, on the other hand, does represent a capability to
 627   // access the given files.
 628   storage::IsolatedContext::FileInfoSet files;
 629   for (std::vector<ui::FileInfo>::iterator iter(
 630            filtered_data.filenames.begin());
 631        iter != filtered_data.filenames.end();
 632        ++iter) {
 633     // A dragged file may wind up as the value of an input element, or it
 634     // may be used as the target of a navigation instead.  We don't know
 635     // which will happen at this point, so generously grant both access
 636     // and request permissions to the specific file to cover both cases.
 637     // We do not give it the permission to request all file:// URLs.
 638
 639     // Make sure we have the same display_name as the one we register.
 640     if (iter->display_name.empty()) {
 641       std::string name;
 642       files.AddPath(iter->path, &name);
 643       iter->display_name = base::FilePath::FromUTF8Unsafe(name);
 644     } else {
 645       files.AddPathWithName(iter->path, iter->display_name.AsUTF8Unsafe());
 646     }
 647
 648     policy->GrantRequestSpecificFileURL(renderer_id,
 649                                         net::FilePathToFileURL(iter->path));
 650
 651     // If the renderer already has permission to read these paths, we don't need
 652     // to re-grant them. This prevents problems with DnD for files in the CrOS
 653     // file manager--the file manager already had read/write access to those
 654     // directories, but dragging a file would cause the read/write access to be
 655     // overwritten with read-only access, making them impossible to delete or
 656     // rename until the renderer was killed.
 657     if (!policy->CanReadFile(renderer_id, iter->path))
 658       policy->GrantReadFile(renderer_id, iter->path);
 659   }
 660
 661   storage::IsolatedContext* isolated_context =
 662       storage::IsolatedContext::GetInstance();
 663   DCHECK(isolated_context);
 664   std::string filesystem_id = isolated_context->RegisterDraggedFileSystem(
 665       files);
 666   if (!filesystem_id.empty()) {
 667     // Grant the permission iff the ID is valid.
 668     policy->GrantReadFileSystem(renderer_id, filesystem_id);
 669   }
 670   filtered_data.filesystem_id = base::UTF8ToUTF16(filesystem_id);
 671
 672   storage::FileSystemContext* file_system_context =
 673       BrowserContext::GetStoragePartition(GetProcess()->GetBrowserContext(),
 674                                           GetSiteInstance())
 675           ->GetFileSystemContext();
 676   for (size_t i = 0; i < filtered_data.file_system_files.size(); ++i) {
 677     storage::FileSystemURL file_system_url =
 678         file_system_context->CrackURL(filtered_data.file_system_files[i].url);
 679
 680     std::string register_name;
 681     std::string filesystem_id = isolated_context->RegisterFileSystemForPath(
 682         file_system_url.type(), file_system_url.filesystem_id(),
 683         file_system_url.path(), &register_name);
 684     policy->GrantReadFileSystem(renderer_id, filesystem_id);
 685
 686     // Note: We are using the origin URL provided by the sender here. It may be
 687     // different from the receiver's.
 688     filtered_data.file_system_files[i].url =
 689         GURL(storage::GetIsolatedFileSystemRootURIString(
 690                  file_system_url.origin(), filesystem_id, std::string())
 691                  .append(register_name));
 692   }
 693
 694   Send(new DragMsg_TargetDragEnter(GetRoutingID(), filtered_data, client_pt,
 695                                    screen_pt, operations_allowed,
 696                                    key_modifiers));
 697 }
 698
 699 void RenderViewHostImpl::DragTargetDragOver(
 700     const gfx::Point& client_pt,
 701     const gfx::Point& screen_pt,
 702     WebDragOperationsMask operations_allowed,
 703     int key_modifiers) {
 704   Send(new DragMsg_TargetDragOver(GetRoutingID(), client_pt, screen_pt,
 705                                   operations_allowed, key_modifiers));
 706 }
 707
 708 void RenderViewHostImpl::DragTargetDragLeave() {
 709   Send(new DragMsg_TargetDragLeave(GetRoutingID()));
 710 }
 711
 712 void RenderViewHostImpl::DragTargetDrop(
 713     const gfx::Point& client_pt,
 714     const gfx::Point& screen_pt,
 715     int key_modifiers) {
 716   Send(new DragMsg_TargetDrop(GetRoutingID(), client_pt, screen_pt,
 717                               key_modifiers));
 718 }
 719
 720 void RenderViewHostImpl::DragSourceEndedAt(
 721     int client_x, int client_y, int screen_x, int screen_y,
 722     WebDragOperation operation) {
 723   Send(new DragMsg_SourceEnded(GetRoutingID(),
 724                                gfx::Point(client_x, client_y),
 725                                gfx::Point(screen_x, screen_y),
 726                                operation));
 727 }
 728
 729 void RenderViewHostImpl::DragSourceSystemDragEnded() {
 730   Send(new DragMsg_SourceSystemDragEnded(GetRoutingID()));
 731 }
 732
 733 RenderFrameHost* RenderViewHostImpl::GetMainFrame() {
 734   return RenderFrameHost::FromID(GetProcess()->GetID(), main_frame_routing_id_);
 735 }
 736
 737 void RenderViewHostImpl::AllowBindings(int bindings_flags) {
 738   // Never grant any bindings to browser plugin guests.
 739   if (GetProcess()->IsForGuestsOnly()) {
 740     NOTREACHED() << "Never grant bindings to a guest process.";
 741     return;
 742   }
 743
 744   // Ensure we aren't granting WebUI bindings to a process that has already
 745   // been used for non-privileged views.
 746   if (bindings_flags & BINDINGS_POLICY_WEB_UI &&
 747       GetProcess()->HasConnection() &&
 748       !ChildProcessSecurityPolicyImpl::GetInstance()->HasWebUIBindings(
 749           GetProcess()->GetID())) {
 750     // This process has no bindings yet. Make sure it does not have more
 751     // than this single active view.
 752     // --single-process only has one renderer.
 753     if (GetProcess()->GetActiveViewCount() > 1 &&
 754         !base::CommandLine::ForCurrentProcess()->HasSwitch(
 755             switches::kSingleProcess))
 756       return;
 757   }
 758
 759   if (bindings_flags & BINDINGS_POLICY_WEB_UI) {
 760     ChildProcessSecurityPolicyImpl::GetInstance()->GrantWebUIBindings(
 761         GetProcess()->GetID());
 762   }
 763
 764   enabled_bindings_ |= bindings_flags;
 765   if (renderer_initialized())
 766     Send(new ViewMsg_AllowBindings(GetRoutingID(), enabled_bindings_));
 767 }
 768
 769 int RenderViewHostImpl::GetEnabledBindings() const {
 770   return enabled_bindings_;
 771 }
 772
 773 void RenderViewHostImpl::SetWebUIProperty(const std::string& name,
 774                                           const std::string& value) {
 775   // This is a sanity check before telling the renderer to enable the property.
 776   // It could lie and send the corresponding IPC messages anyway, but we will
 777   // not act on them if enabled_bindings_ doesn't agree. If we get here without
 778   // WebUI bindings, kill the renderer process.
 779   if (enabled_bindings_ & BINDINGS_POLICY_WEB_UI) {
 780     Send(new ViewMsg_SetWebUIProperty(GetRoutingID(), name, value));
 781   } else {
 782     RecordAction(
 783         base::UserMetricsAction("BindingsMismatchTerminate_RVH_WebUI"));
 784     GetProcess()->Shutdown(content::RESULT_CODE_KILLED, false);
 785   }
 786 }
 787
 788 void RenderViewHostImpl::GotFocus() {
 789   RenderWidgetHostImpl::GotFocus();  // Notifies the renderer it got focus.
 790
 791   RenderViewHostDelegateView* view = delegate_->GetDelegateView();
 792   if (view)
 793     view->GotFocus();
 794 }
 795
 796 void RenderViewHostImpl::LostCapture() {
 797   RenderWidgetHostImpl::LostCapture();
 798   delegate_->LostCapture();
 799 }
 800
 801 void RenderViewHostImpl::LostMouseLock() {
 802   RenderWidgetHostImpl::LostMouseLock();
 803   delegate_->LostMouseLock();
 804 }
 805
 806 void RenderViewHostImpl::SetInitialFocus(bool reverse) {
 807   Send(new ViewMsg_SetInitialFocus(GetRoutingID(), reverse));
 808 }
 809
 810 void RenderViewHostImpl::FilesSelectedInChooser(
 811     const std::vector<content::FileChooserFileInfo>& files,
 812     FileChooserParams::Mode permissions) {
 813   storage::FileSystemContext* const file_system_context =
 814       BrowserContext::GetStoragePartition(GetProcess()->GetBrowserContext(),
 815                                           GetSiteInstance())
 816           ->GetFileSystemContext();
 817   // Grant the security access requested to the given files.
 818   for (size_t i = 0; i < files.size(); ++i) {
 819     const content::FileChooserFileInfo& file = files[i];
 820     if (permissions == FileChooserParams::Save) {
 821       ChildProcessSecurityPolicyImpl::GetInstance()->GrantCreateReadWriteFile(
 822           GetProcess()->GetID(), file.file_path);
 823     } else {
 824       ChildProcessSecurityPolicyImpl::GetInstance()->GrantReadFile(
 825           GetProcess()->GetID(), file.file_path);
 826     }
 827     if (file.file_system_url.is_valid()) {
 828       ChildProcessSecurityPolicyImpl::GetInstance()->GrantReadFileSystem(
 829           GetProcess()->GetID(),
 830           file_system_context->CrackURL(file.file_system_url)
 831           .mount_filesystem_id());
 832     }
 833   }
 834   Send(new ViewMsg_RunFileChooserResponse(GetRoutingID(), files));
 835 }
 836
 837 void RenderViewHostImpl::DirectoryEnumerationFinished(
 838     int request_id,
 839     const std::vector<base::FilePath>& files) {
 840   // Grant the security access requested to the given files.
 841   for (std::vector<base::FilePath>::const_iterator file = files.begin();
 842        file != files.end(); ++file) {
 843     ChildProcessSecurityPolicyImpl::GetInstance()->GrantReadFile(
 844         GetProcess()->GetID(), *file);
 845   }
 846   Send(new ViewMsg_EnumerateDirectoryResponse(GetRoutingID(),
 847                                               request_id,
 848                                               files));
 849 }
 850
 851 void RenderViewHostImpl::SetIsLoading(bool is_loading) {
 852   if (ResourceDispatcherHostImpl::Get()) {
 853     BrowserThread::PostTask(
 854         BrowserThread::IO,
 855         FROM_HERE,
 856         base::Bind(&ResourceDispatcherHostImpl::OnRenderViewHostSetIsLoading,
 857                    base::Unretained(ResourceDispatcherHostImpl::Get()),
 858                    GetProcess()->GetID(),
 859                    GetRoutingID(),
 860                    is_loading));
 861   }
 862   RenderWidgetHostImpl::SetIsLoading(is_loading);
 863 }
 864
 865 void RenderViewHostImpl::LoadStateChanged(
 866     const GURL& url,
 867     const net::LoadStateWithParam& load_state,
 868     uint64 upload_position,
 869     uint64 upload_size) {
 870   delegate_->LoadStateChanged(url, load_state, upload_position, upload_size);
 871 }
 872
 873 bool RenderViewHostImpl::SuddenTerminationAllowed() const {
 874   return sudden_termination_allowed_ ||
 875       GetProcess()->SuddenTerminationAllowed();
 876 }
 877
 878 ///////////////////////////////////////////////////////////////////////////////
 879 // RenderViewHostImpl, IPC message handlers:
 880
 881 bool RenderViewHostImpl::OnMessageReceived(const IPC::Message& msg) {
 882   if (!BrowserMessageFilter::CheckCanDispatchOnUI(msg, this))
 883     return true;
 884
 885   // Filter out most IPC messages if this renderer is swapped out.
 886   // We still want to handle certain ACKs to keep our state consistent.
 887   if (is_swapped_out_) {
 888     if (!SwappedOutMessages::CanHandleWhileSwappedOut(msg)) {
 889       // If this is a synchronous message and we decided not to handle it,
 890       // we must send an error reply, or else the renderer will be stuck
 891       // and won't respond to future requests.
 892       if (msg.is_sync()) {
 893         IPC::Message* reply = IPC::SyncMessage::GenerateReply(&msg);
 894         reply->set_reply_error();
 895         Send(reply);
 896       }
 897       // Don't continue looking for someone to handle it.
 898       return true;
 899     }
 900   }
 901
 902   if (delegate_->OnMessageReceived(this, msg))
 903     return true;
 904
 905   bool handled = true;
 906   IPC_BEGIN_MESSAGE_MAP(RenderViewHostImpl, msg)
 907     IPC_MESSAGE_HANDLER(FrameHostMsg_RenderProcessGone, OnRenderProcessGone)
 908     IPC_MESSAGE_HANDLER(ViewHostMsg_ShowView, OnShowView)
 909     IPC_MESSAGE_HANDLER(ViewHostMsg_ShowWidget, OnShowWidget)
 910     IPC_MESSAGE_HANDLER(ViewHostMsg_ShowFullscreenWidget,
 911                         OnShowFullscreenWidget)
 912     IPC_MESSAGE_HANDLER(ViewHostMsg_RenderViewReady, OnRenderViewReady)
 913     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateState, OnUpdateState)
 914     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateTargetURL, OnUpdateTargetURL)
 915     IPC_MESSAGE_HANDLER(ViewHostMsg_Close, OnClose)
 916     IPC_MESSAGE_HANDLER(ViewHostMsg_RequestMove, OnRequestMove)
 917     IPC_MESSAGE_HANDLER(ViewHostMsg_DocumentAvailableInMainFrame,
 918                         OnDocumentAvailableInMainFrame)
 919     IPC_MESSAGE_HANDLER(ViewHostMsg_DidContentsPreferredSizeChange,
 920                         OnDidContentsPreferredSizeChange)
 921     IPC_MESSAGE_HANDLER(ViewHostMsg_RouteCloseEvent,
 922                         OnRouteCloseEvent)
 923     IPC_MESSAGE_HANDLER(DragHostMsg_StartDragging, OnStartDragging)
 924     IPC_MESSAGE_HANDLER(DragHostMsg_UpdateDragCursor, OnUpdateDragCursor)
 925     IPC_MESSAGE_HANDLER(ViewHostMsg_TakeFocus, OnTakeFocus)
 926     IPC_MESSAGE_HANDLER(ViewHostMsg_FocusedNodeChanged, OnFocusedNodeChanged)
 927     IPC_MESSAGE_HANDLER(ViewHostMsg_ClosePage_ACK, OnClosePageACK)
 928     IPC_MESSAGE_HANDLER(ViewHostMsg_DidZoomURL, OnDidZoomURL)
 929     IPC_MESSAGE_HANDLER(ViewHostMsg_PageScaleFactorIsOneChanged,
 930                         OnPageScaleFactorIsOneChanged)
 931     IPC_MESSAGE_HANDLER(ViewHostMsg_RunFileChooser, OnRunFileChooser)
 932     IPC_MESSAGE_HANDLER(ViewHostMsg_FocusedNodeTouched, OnFocusedNodeTouched)
 933     // Have the super handle all other messages.
 934     IPC_MESSAGE_UNHANDLED(
 935         handled = RenderWidgetHostImpl::OnMessageReceived(msg))
 936   IPC_END_MESSAGE_MAP()
 937
 938   return handled;
 939 }
 940
 941 void RenderViewHostImpl::Init() {
 942   RenderWidgetHostImpl::Init();
 943 }
 944
 945 void RenderViewHostImpl::Shutdown() {
 946   // We can't release the SessionStorageNamespace until our peer
 947   // in the renderer has wound down.
 948   if (GetProcess()->HasConnection()) {
 949     RenderProcessHostImpl::ReleaseOnCloseACK(
 950         GetProcess(),
 951         delegate_->GetSessionStorageNamespaceMap(),
 952         GetRoutingID());
 953   }
 954
 955   RenderWidgetHostImpl::Shutdown();
 956 }
 957
 958 void RenderViewHostImpl::WasHidden() {
 959   if (ResourceDispatcherHostImpl::Get()) {
 960     BrowserThread::PostTask(
 961         BrowserThread::IO, FROM_HERE,
 962         base::Bind(&ResourceDispatcherHostImpl::OnRenderViewHostWasHidden,
 963                    base::Unretained(ResourceDispatcherHostImpl::Get()),
 964                    GetProcess()->GetID(), GetRoutingID()));
 965   }
 966
 967   RenderWidgetHostImpl::WasHidden();
 968 }
 969
 970 void RenderViewHostImpl::WasShown(const ui::LatencyInfo& latency_info) {
 971   if (ResourceDispatcherHostImpl::Get()) {
 972     BrowserThread::PostTask(
 973         BrowserThread::IO, FROM_HERE,
 974         base::Bind(&ResourceDispatcherHostImpl::OnRenderViewHostWasShown,
 975                    base::Unretained(ResourceDispatcherHostImpl::Get()),
 976                    GetProcess()->GetID(), GetRoutingID()));
 977   }
 978
 979   RenderWidgetHostImpl::WasShown(latency_info);
 980 }
 981
 982 bool RenderViewHostImpl::IsRenderView() const {
 983   return true;
 984 }
 985
 986 void RenderViewHostImpl::CreateNewWindow(
 987     int route_id,
 988     int main_frame_route_id,
 989     const ViewHostMsg_CreateWindow_Params& params,
 990     SessionStorageNamespace* session_storage_namespace) {
 991   ViewHostMsg_CreateWindow_Params validated_params(params);
 992   GetProcess()->FilterURL(false, &validated_params.target_url);
 993   GetProcess()->FilterURL(false, &validated_params.opener_url);
 994   GetProcess()->FilterURL(true, &validated_params.opener_security_origin);
 995
 996   delegate_->CreateNewWindow(GetSiteInstance(), route_id, main_frame_route_id,
 997                              validated_params, session_storage_namespace);
 998 }
 999
1000 void RenderViewHostImpl::CreateNewWidget(int32 route_id,
1001                                          int32 surface_id,
1002                                          blink::WebPopupType popup_type) {
1003   delegate_->CreateNewWidget(GetProcess()->GetID(), route_id, surface_id,
1004                              popup_type);
1005 }
1006
1007 void RenderViewHostImpl::CreateNewFullscreenWidget(int32 route_id,
1008                                                    int32 surface_id) {
1009   delegate_->CreateNewFullscreenWidget(GetProcess()->GetID(), route_id,
1010                                        surface_id);
1011 }
1012
1013 void RenderViewHostImpl::OnShowView(int route_id,
1014                                     WindowOpenDisposition disposition,
1015                                     const gfx::Rect& initial_rect,
1016                                     bool user_gesture) {
1017   delegate_->ShowCreatedWindow(route_id, disposition, initial_rect,
1018                                user_gesture);
1019   Send(new ViewMsg_Move_ACK(route_id));
1020 }
1021
1022 void RenderViewHostImpl::OnShowWidget(int route_id,
1023                                       const gfx::Rect& initial_rect) {
1024   if (is_active_)
1025     delegate_->ShowCreatedWidget(route_id, initial_rect);
1026   Send(new ViewMsg_Move_ACK(route_id));
1027 }
1028
1029 void RenderViewHostImpl::OnShowFullscreenWidget(int route_id) {
1030   if (is_active_)
1031     delegate_->ShowCreatedFullscreenWidget(route_id);
1032   Send(new ViewMsg_Move_ACK(route_id));
1033 }
1034
1035 void RenderViewHostImpl::OnRenderViewReady() {
1036   render_view_termination_status_ = base::TERMINATION_STATUS_STILL_RUNNING;
1037   SendScreenRects();
1038   WasResized();
1039   delegate_->RenderViewReady(this);
1040 }
1041
1042 void RenderViewHostImpl::OnRenderProcessGone(int status, int exit_code) {
1043   // Do nothing, otherwise RenderWidgetHostImpl will assume it is not a
1044   // RenderViewHostImpl and destroy itself.
1045   // TODO(nasko): Remove this hack once RenderViewHost and RenderWidgetHost are
1046   // decoupled.
1047 }
1048
1049 void RenderViewHostImpl::OnUpdateState(int32 page_id, const PageState& state) {
1050   // If the following DCHECK fails, you have encountered a tricky edge-case that
1051   // has evaded reproduction for a very long time. Please report what you were
1052   // doing on http://crbug.com/407376, whether or not you can reproduce the
1053   // failure.
1054   DCHECK_EQ(page_id, page_id_);
1055
1056   // Without this check, the renderer can trick the browser into using
1057   // filenames it can't access in a future session restore.
1058   if (!CanAccessFilesOfPageState(state)) {
1059     bad_message::ReceivedBadMessage(
1060         GetProcess(), bad_message::RVH_CAN_ACCESS_FILES_OF_PAGE_STATE);
1061     return;
1062   }
1063
1064   delegate_->UpdateState(this, page_id, state);
1065 }
1066
1067 void RenderViewHostImpl::OnUpdateTargetURL(const GURL& url) {
1068   if (is_active_)
1069     delegate_->UpdateTargetURL(this, url);
1070
1071   // Send a notification back to the renderer that we are ready to
1072   // receive more target urls.
1073   Send(new ViewMsg_UpdateTargetURL_ACK(GetRoutingID()));
1074 }
1075
1076 void RenderViewHostImpl::OnClose() {
1077   // If the renderer is telling us to close, it has already run the unload
1078   // events, and we can take the fast path.
1079   ClosePageIgnoringUnloadEvents();
1080 }
1081
1082 void RenderViewHostImpl::OnRequestMove(const gfx::Rect& pos) {
1083   if (is_active_)
1084     delegate_->RequestMove(pos);
1085   Send(new ViewMsg_Move_ACK(GetRoutingID()));
1086 }
1087
1088 void RenderViewHostImpl::OnDocumentAvailableInMainFrame(
1089     bool uses_temporary_zoom_level) {
1090   delegate_->DocumentAvailableInMainFrame(this);
1091
1092   if (!uses_temporary_zoom_level)
1093     return;
1094
1095   HostZoomMapImpl* host_zoom_map =
1096       static_cast<HostZoomMapImpl*>(HostZoomMap::Get(GetSiteInstance()));
1097   host_zoom_map->SetTemporaryZoomLevel(GetProcess()->GetID(),
1098                                        GetRoutingID(),
1099                                        host_zoom_map->GetDefaultZoomLevel());
1100 }
1101
1102 void RenderViewHostImpl::OnDidContentsPreferredSizeChange(
1103     const gfx::Size& new_size) {
1104   delegate_->UpdatePreferredSize(new_size);
1105 }
1106
1107 void RenderViewHostImpl::OnRenderAutoResized(const gfx::Size& new_size) {
1108   delegate_->ResizeDueToAutoResize(new_size);
1109 }
1110
1111 void RenderViewHostImpl::OnRouteCloseEvent() {
1112   // Have the delegate route this to the active RenderViewHost.
1113   delegate_->RouteCloseEvent(this);
1114 }
1115
1116 void RenderViewHostImpl::OnStartDragging(
1117     const DropData& drop_data,
1118     WebDragOperationsMask drag_operations_mask,
1119     const SkBitmap& bitmap,
1120     const gfx::Vector2d& bitmap_offset_in_dip,
1121     const DragEventSourceInfo& event_info) {
1122   RenderViewHostDelegateView* view = delegate_->GetDelegateView();
1123   if (!view)
1124     return;
1125
1126   DropData filtered_data(drop_data);
1127   RenderProcessHost* process = GetProcess();
1128   ChildProcessSecurityPolicyImpl* policy =
1129       ChildProcessSecurityPolicyImpl::GetInstance();
1130
1131   // Allow drag of Javascript URLs to enable bookmarklet drag to bookmark bar.
1132   if (!filtered_data.url.SchemeIs(url::kJavaScriptScheme))
1133     process->FilterURL(true, &filtered_data.url);
1134   process->FilterURL(false, &filtered_data.html_base_url);
1135   // Filter out any paths that the renderer didn't have access to. This prevents
1136   // the following attack on a malicious renderer:
1137   // 1. StartDragging IPC sent with renderer-specified filesystem paths that it
1138   //    doesn't have read permissions for.
1139   // 2. We initiate a native DnD operation.
1140   // 3. DnD operation immediately ends since mouse is not held down. DnD events
1141   //    still fire though, which causes read permissions to be granted to the
1142   //    renderer for any file paths in the drop.
1143   filtered_data.filenames.clear();
1144   for (std::vector<ui::FileInfo>::const_iterator it =
1145            drop_data.filenames.begin();
1146        it != drop_data.filenames.end();
1147        ++it) {
1148     if (policy->CanReadFile(GetProcess()->GetID(), it->path))
1149       filtered_data.filenames.push_back(*it);
1150   }
1151
1152   storage::FileSystemContext* file_system_context =
1153       BrowserContext::GetStoragePartition(GetProcess()->GetBrowserContext(),
1154                                           GetSiteInstance())
1155           ->GetFileSystemContext();
1156   filtered_data.file_system_files.clear();
1157   for (size_t i = 0; i < drop_data.file_system_files.size(); ++i) {
1158     storage::FileSystemURL file_system_url =
1159         file_system_context->CrackURL(drop_data.file_system_files[i].url);
1160     if (policy->CanReadFileSystemFile(GetProcess()->GetID(), file_system_url))
1161       filtered_data.file_system_files.push_back(drop_data.file_system_files[i]);
1162   }
1163
1164   float scale = GetScaleFactorForView(GetView());
1165   gfx::ImageSkia image(gfx::ImageSkiaRep(bitmap, scale));
1166   view->StartDragging(filtered_data, drag_operations_mask, image,
1167       bitmap_offset_in_dip, event_info);
1168 }
1169
1170 void RenderViewHostImpl::OnUpdateDragCursor(WebDragOperation current_op) {
1171   RenderViewHostDelegateView* view = delegate_->GetDelegateView();
1172   if (view)
1173     view->UpdateDragCursor(current_op);
1174 }
1175
1176 void RenderViewHostImpl::OnTakeFocus(bool reverse) {
1177   RenderViewHostDelegateView* view = delegate_->GetDelegateView();
1178   if (view)
1179     view->TakeFocus(reverse);
1180 }
1181
1182 void RenderViewHostImpl::OnFocusedNodeChanged(
1183     bool is_editable_node,
1184     const gfx::Rect& node_bounds_in_viewport) {
1185   is_focused_element_editable_ = is_editable_node;
1186   if (view_)
1187     view_->FocusedNodeChanged(is_editable_node);
1188 #if defined(OS_WIN)
1189   if (!is_editable_node && virtual_keyboard_requested_) {
1190     virtual_keyboard_requested_ = false;
1191     delegate_->SetIsVirtualKeyboardRequested(false);
1192     BrowserThread::PostDelayedTask(
1193         BrowserThread::UI, FROM_HERE,
1194         base::Bind(base::IgnoreResult(&DismissVirtualKeyboardTask)),
1195         TimeDelta::FromMilliseconds(kVirtualKeyboardDisplayWaitTimeoutMs));
1196   }
1197 #endif
1198
1199   // Convert node_bounds to screen coordinates.
1200   gfx::Rect view_bounds_in_screen = view_->GetViewBounds();
1201   gfx::Point origin = node_bounds_in_viewport.origin();
1202   origin.Offset(view_bounds_in_screen.x(), view_bounds_in_screen.y());
1203   gfx::Rect node_bounds_in_screen(origin.x(), origin.y(),
1204                                   node_bounds_in_viewport.width(),
1205                                   node_bounds_in_viewport.height());
1206   FocusedNodeDetails details = {is_editable_node, node_bounds_in_screen};
1207   NotificationService::current()->Notify(NOTIFICATION_FOCUS_CHANGED_IN_PAGE,
1208                                          Source<RenderViewHost>(this),
1209                                          Details<FocusedNodeDetails>(&details));
1210 }
1211
1212 void RenderViewHostImpl::OnUserGesture() {
1213   delegate_->OnUserGesture();
1214 }
1215
1216 void RenderViewHostImpl::OnClosePageACK() {
1217   decrement_in_flight_event_count();
1218   ClosePageIgnoringUnloadEvents();
1219 }
1220
1221 void RenderViewHostImpl::NotifyRendererUnresponsive() {
1222   delegate_->RendererUnresponsive(this);
1223 }
1224
1225 void RenderViewHostImpl::NotifyRendererResponsive() {
1226   delegate_->RendererResponsive(this);
1227 }
1228
1229 void RenderViewHostImpl::RequestToLockMouse(bool user_gesture,
1230                                             bool last_unlocked_by_target) {
1231   delegate_->RequestToLockMouse(user_gesture, last_unlocked_by_target);
1232 }
1233
1234 bool RenderViewHostImpl::IsFullscreenGranted() const {
1235   return delegate_->IsFullscreenForCurrentTab();
1236 }
1237
1238 blink::WebDisplayMode RenderViewHostImpl::GetDisplayMode() const {
1239   return delegate_->GetDisplayMode();
1240 }
1241
1242 void RenderViewHostImpl::OnFocus() {
1243   // Note: We allow focus and blur from swapped out RenderViewHosts, even when
1244   // the active RenderViewHost is in a different BrowsingInstance (e.g., WebUI).
1245   delegate_->Activate();
1246 }
1247
1248 void RenderViewHostImpl::OnBlur() {
1249   delegate_->Deactivate();
1250 }
1251
1252 gfx::Rect RenderViewHostImpl::GetRootWindowResizerRect() const {
1253   return delegate_->GetRootWindowResizerRect();
1254 }
1255
1256 void RenderViewHostImpl::ForwardMouseEvent(
1257     const blink::WebMouseEvent& mouse_event) {
1258   RenderWidgetHostImpl::ForwardMouseEvent(mouse_event);
1259   if (mouse_event.type == WebInputEvent::MouseWheel && ignore_input_events())
1260     delegate_->OnIgnoredUIEvent();
1261 }
1262
1263 void RenderViewHostImpl::ForwardKeyboardEvent(
1264     const NativeWebKeyboardEvent& key_event) {
1265   if (ignore_input_events()) {
1266     if (key_event.type == WebInputEvent::RawKeyDown)
1267       delegate_->OnIgnoredUIEvent();
1268     return;
1269   }
1270   RenderWidgetHostImpl::ForwardKeyboardEvent(key_event);
1271 }
1272
1273 void RenderViewHostImpl::OnTextSurroundingSelectionResponse(
1274     const base::string16& content,
1275     size_t start_offset,
1276     size_t end_offset) {
1277   if (!view_)
1278     return;
1279   view_->OnTextSurroundingSelectionResponse(content, start_offset, end_offset);
1280 }
1281
1282 WebPreferences RenderViewHostImpl::GetWebkitPreferences() {
1283   if (!web_preferences_.get()) {
1284     OnWebkitPreferencesChanged();
1285   }
1286   return *web_preferences_;
1287 }
1288
1289 void RenderViewHostImpl::UpdateWebkitPreferences(const WebPreferences& prefs) {
1290   web_preferences_.reset(new WebPreferences(prefs));
1291   Send(new ViewMsg_UpdateWebPreferences(GetRoutingID(), prefs));
1292 }
1293
1294 void RenderViewHostImpl::OnWebkitPreferencesChanged() {
1295   // This is defensive code to avoid infinite loops due to code run inside
1296   // UpdateWebkitPreferences() accidentally updating more preferences and thus
1297   // calling back into this code. See crbug.com/398751 for one past example.
1298   if (updating_web_preferences_)
1299     return;
1300   updating_web_preferences_ = true;
1301   UpdateWebkitPreferences(ComputeWebkitPrefs());
1302   updating_web_preferences_ = false;
1303 }
1304
1305 void RenderViewHostImpl::ClearFocusedElement() {
1306   is_focused_element_editable_ = false;
1307   Send(new ViewMsg_ClearFocusedElement(GetRoutingID()));
1308 }
1309
1310 bool RenderViewHostImpl::IsFocusedElementEditable() {
1311   return is_focused_element_editable_;
1312 }
1313
1314 void RenderViewHostImpl::Zoom(PageZoom zoom) {
1315   Send(new ViewMsg_Zoom(GetRoutingID(), zoom));
1316 }
1317
1318 void RenderViewHostImpl::DisableScrollbarsForThreshold(const gfx::Size& size) {
1319   Send(new ViewMsg_DisableScrollbarsForSmallWindows(GetRoutingID(), size));
1320 }
1321
1322 void RenderViewHostImpl::EnablePreferredSizeMode() {
1323   Send(new ViewMsg_EnablePreferredSizeChangedMode(GetRoutingID()));
1324 }
1325
1326 void RenderViewHostImpl::EnableAutoResize(const gfx::Size& min_size,
1327                                           const gfx::Size& max_size) {
1328   SetAutoResize(true, min_size, max_size);
1329   Send(new ViewMsg_EnableAutoResize(GetRoutingID(), min_size, max_size));
1330 }
1331
1332 void RenderViewHostImpl::DisableAutoResize(const gfx::Size& new_size) {
1333   SetAutoResize(false, gfx::Size(), gfx::Size());
1334   Send(new ViewMsg_DisableAutoResize(GetRoutingID(), new_size));
1335   if (!new_size.IsEmpty())
1336     GetView()->SetSize(new_size);
1337 }
1338
1339 void RenderViewHostImpl::CopyImageAt(int x, int y) {
1340   Send(new ViewMsg_CopyImageAt(GetRoutingID(), x, y));
1341 }
1342
1343 void RenderViewHostImpl::SaveImageAt(int x, int y) {
1344   Send(new ViewMsg_SaveImageAt(GetRoutingID(), x, y));
1345 }
1346
1347 void RenderViewHostImpl::ExecuteMediaPlayerActionAtLocation(
1348   const gfx::Point& location, const blink::WebMediaPlayerAction& action) {
1349   Send(new ViewMsg_MediaPlayerActionAt(GetRoutingID(), location, action));
1350 }
1351
1352 void RenderViewHostImpl::ExecutePluginActionAtLocation(
1353   const gfx::Point& location, const blink::WebPluginAction& action) {
1354   Send(new ViewMsg_PluginActionAt(GetRoutingID(), location, action));
1355 }
1356
1357 void RenderViewHostImpl::NotifyMoveOrResizeStarted() {
1358   Send(new ViewMsg_MoveOrResizeStarted(GetRoutingID()));
1359 }
1360
1361 void RenderViewHostImpl::OnDidZoomURL(double zoom_level,
1362                                       const GURL& url) {
1363   HostZoomMapImpl* host_zoom_map =
1364       static_cast<HostZoomMapImpl*>(HostZoomMap::Get(GetSiteInstance()));
1365
1366   host_zoom_map->SetZoomLevelForView(GetProcess()->GetID(),
1367                                      GetRoutingID(),
1368                                      zoom_level,
1369                                      net::GetHostOrSpecFromURL(url));
1370 }
1371
1372 void RenderViewHostImpl::OnPageScaleFactorIsOneChanged(bool is_one) {
1373   if (!GetSiteInstance())
1374     return;
1375   HostZoomMapImpl* host_zoom_map =
1376       static_cast<HostZoomMapImpl*>(HostZoomMap::Get(GetSiteInstance()));
1377   if (!host_zoom_map)
1378     return;
1379   if (!GetProcess())
1380     return;
1381   host_zoom_map->SetPageScaleFactorIsOneForView(GetProcess()->GetID(),
1382                                                 GetRoutingID(), is_one);
1383 }
1384
1385 void RenderViewHostImpl::OnRunFileChooser(const FileChooserParams& params) {
1386   // Do not allow messages with absolute paths in them as this can permit a
1387   // renderer to coerce the browser to perform I/O on a renderer controlled
1388   // path.
1389   if (params.default_file_name != params.default_file_name.BaseName()) {
1390     bad_message::ReceivedBadMessage(GetProcess(),
1391                                     bad_message::RVH_FILE_CHOOSER_PATH);
1392     return;
1393   }
1394
1395   delegate_->RunFileChooser(this, params);
1396 }
1397
1398 void RenderViewHostImpl::OnFocusedNodeTouched(bool editable) {
1399 #if defined(OS_WIN)
1400   if (editable) {
1401     virtual_keyboard_requested_ = base::win::DisplayVirtualKeyboard();
1402     delegate_->SetIsVirtualKeyboardRequested(true);
1403   } else {
1404     virtual_keyboard_requested_ = false;
1405     delegate_->SetIsVirtualKeyboardRequested(false);
1406     base::win::DismissVirtualKeyboard();
1407   }
1408 #endif
1409 }
1410
1411 bool RenderViewHostImpl::CanAccessFilesOfPageState(
1412     const PageState& state) const {
1413   ChildProcessSecurityPolicyImpl* policy =
1414       ChildProcessSecurityPolicyImpl::GetInstance();
1415
1416   const std::vector<base::FilePath>& file_paths = state.GetReferencedFiles();
1417   for (const auto& file : file_paths) {
1418     if (!policy->CanReadFile(GetProcess()->GetID(), file))
1419       return false;
1420   }
1421   return true;
1422 }
1423
1424 void RenderViewHostImpl::GrantFileAccessFromPageState(const PageState& state) {
1425   ChildProcessSecurityPolicyImpl* policy =
1426       ChildProcessSecurityPolicyImpl::GetInstance();
1427
1428   const std::vector<base::FilePath>& file_paths = state.GetReferencedFiles();
1429   for (const auto& file : file_paths) {
1430     if (!policy->CanReadFile(GetProcess()->GetID(), file))
1431       policy->GrantReadFile(GetProcess()->GetID(), file);
1432   }
1433 }
1434
1435 void RenderViewHostImpl::SelectWordAroundCaret() {
1436   Send(new ViewMsg_SelectWordAroundCaret(GetRoutingID()));
1437 }
1438
1439 }  // namespace content