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       nav_entry_id_(0),
 218       is_active_(!swapped_out),
 219       is_swapped_out_(swapped_out),
 220       main_frame_routing_id_(main_frame_routing_id),
 221       is_waiting_for_close_ack_(false),
 222       sudden_termination_allowed_(false),
 223       render_view_termination_status_(base::TERMINATION_STATUS_STILL_RUNNING),
 224       virtual_keyboard_requested_(false),
 225       is_focused_element_editable_(false),
 226       updating_web_preferences_(false),
 227       weak_factory_(this) {
 228   DCHECK(instance_.get());
 229   CHECK(delegate_);  // http://crbug.com/82827
 230
 231   GetProcess()->AddObserver(this);
 232   GetProcess()->EnableSendQueue();
 233
 234   if (ResourceDispatcherHostImpl::Get()) {
 235     bool has_active_audio = false;
 236     if (has_initialized_audio_host) {
 237       scoped_refptr<AudioRendererHost> arh =
 238           static_cast<RenderProcessHostImpl*>(GetProcess())
 239               ->audio_renderer_host();
 240       if (arh.get())
 241         has_active_audio =
 242             arh->RenderFrameHasActiveAudio(main_frame_routing_id_);
 243     }
 244     BrowserThread::PostTask(
 245         BrowserThread::IO,
 246         FROM_HERE,
 247         base::Bind(&ResourceDispatcherHostImpl::OnRenderViewHostCreated,
 248                    base::Unretained(ResourceDispatcherHostImpl::Get()),
 249                    GetProcess()->GetID(),
 250                    GetRoutingID(),
 251                    !is_hidden(),
 252                    has_active_audio));
 253   }
 254 }
 255
 256 RenderViewHostImpl::~RenderViewHostImpl() {
 257   if (ResourceDispatcherHostImpl::Get()) {
 258     BrowserThread::PostTask(
 259         BrowserThread::IO, FROM_HERE,
 260         base::Bind(&ResourceDispatcherHostImpl::OnRenderViewHostDeleted,
 261                    base::Unretained(ResourceDispatcherHostImpl::Get()),
 262                    GetProcess()->GetID(), GetRoutingID()));
 263   }
 264
 265   delegate_->RenderViewDeleted(this);
 266   GetProcess()->RemoveObserver(this);
 267 }
 268
 269 RenderViewHostDelegate* RenderViewHostImpl::GetDelegate() const {
 270   return delegate_;
 271 }
 272
 273 SiteInstanceImpl* RenderViewHostImpl::GetSiteInstance() const {
 274   return instance_.get();
 275 }
 276
 277 bool RenderViewHostImpl::CreateRenderView(
 278     int opener_frame_route_id,
 279     int proxy_route_id,
 280     int32 max_page_id,
 281     const FrameReplicationState& replicated_frame_state,
 282     bool window_was_created_with_opener) {
 283   TRACE_EVENT0("renderer_host,navigation",
 284                "RenderViewHostImpl::CreateRenderView");
 285   DCHECK(!IsRenderViewLive()) << "Creating view twice";
 286
 287   // The process may (if we're sharing a process with another host that already
 288   // initialized it) or may not (we have our own process or the old process
 289   // crashed) have been initialized. Calling Init multiple times will be
 290   // ignored, so this is safe.
 291   if (!GetProcess()->Init())
 292     return false;
 293   DCHECK(GetProcess()->HasConnection());
 294   DCHECK(GetProcess()->GetBrowserContext());
 295
 296   set_renderer_initialized(true);
 297
 298   GpuSurfaceTracker::Get()->SetSurfaceHandle(
 299       surface_id(), GetCompositingSurface());
 300
 301   // Ensure the RenderView starts with a next_page_id larger than any existing
 302   // page ID it might be asked to render.
 303   int32 next_page_id = 1;
 304   if (max_page_id > -1)
 305     next_page_id = max_page_id + 1;
 306
 307   ViewMsg_New_Params params;
 308   params.renderer_preferences =
 309       delegate_->GetRendererPrefs(GetProcess()->GetBrowserContext());
 310 #if defined(OS_WIN)
 311   GetWindowsSpecificPrefs(&params.renderer_preferences);
 312 #endif
 313   params.web_preferences = GetWebkitPreferences();
 314   params.view_id = GetRoutingID();
 315   params.main_frame_routing_id = main_frame_routing_id_;
 316   params.surface_id = surface_id();
 317   params.session_storage_namespace_id =
 318       delegate_->GetSessionStorageNamespace(instance_.get())->id();
 319   // Ensure the RenderView sets its opener correctly.
 320   params.opener_frame_route_id = opener_frame_route_id;
 321   params.swapped_out = !is_active_;
 322   params.replicated_frame_state = replicated_frame_state;
 323   params.proxy_routing_id = proxy_route_id;
 324   params.hidden = is_hidden();
 325   params.never_visible = delegate_->IsNeverVisible();
 326   params.window_was_created_with_opener = window_was_created_with_opener;
 327   params.next_page_id = next_page_id;
 328   params.enable_auto_resize = auto_resize_enabled();
 329   params.min_size = min_size_for_auto_resize();
 330   params.max_size = max_size_for_auto_resize();
 331   GetResizeParams(&params.initial_size);
 332
 333   if (!Send(new ViewMsg_New(params)))
 334     return false;
 335   SetInitialRenderSizeParams(params.initial_size);
 336
 337   // If the RWHV has not yet been set, the surface ID namespace will get
 338   // passed down by the call to SetView().
 339   if (view_) {
 340     Send(new ViewMsg_SetSurfaceIdNamespace(GetRoutingID(),
 341                                            view_->GetSurfaceIdNamespace()));
 342   }
 343
 344   // If it's enabled, tell the renderer to set up the Javascript bindings for
 345   // sending messages back to the browser.
 346   if (GetProcess()->IsForGuestsOnly())
 347     DCHECK_EQ(0, enabled_bindings_);
 348   Send(new ViewMsg_AllowBindings(GetRoutingID(), enabled_bindings_));
 349   // Let our delegate know that we created a RenderView.
 350   delegate_->RenderViewCreated(this);
 351
 352   // Since this method can create the main RenderFrame in the renderer process,
 353   // set the proper state on its corresponding RenderFrameHost.
 354   if (main_frame_routing_id_ != MSG_ROUTING_NONE) {
 355     RenderFrameHostImpl::FromID(GetProcess()->GetID(), main_frame_routing_id_)
 356         ->SetRenderFrameCreated(true);
 357   }
 358
 359   return true;
 360 }
 361
 362 bool RenderViewHostImpl::IsRenderViewLive() const {
 363   return GetProcess()->HasConnection() && renderer_initialized();
 364 }
 365
 366 void RenderViewHostImpl::SyncRendererPrefs() {
 367   RendererPreferences renderer_preferences =
 368       delegate_->GetRendererPrefs(GetProcess()->GetBrowserContext());
 369 #if defined(OS_WIN)
 370   GetWindowsSpecificPrefs(&renderer_preferences);
 371 #endif
 372   Send(new ViewMsg_SetRendererPrefs(GetRoutingID(), renderer_preferences));
 373 }
 374
 375 WebPreferences RenderViewHostImpl::ComputeWebkitPrefs() {
 376   TRACE_EVENT0("browser", "RenderViewHostImpl::GetWebkitPrefs");
 377   WebPreferences prefs;
 378
 379   const base::CommandLine& command_line =
 380       *base::CommandLine::ForCurrentProcess();
 381
 382   prefs.web_security_enabled =
 383       !command_line.HasSwitch(switches::kDisableWebSecurity);
 384   prefs.java_enabled =
 385       !command_line.HasSwitch(switches::kDisableJava);
 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_meta_enabled =
 504       command_line.HasSwitch(switches::kEnableViewportMeta);
 505
 506   prefs.viewport_enabled =
 507       command_line.HasSwitch(switches::kEnableViewport) ||
 508       prefs.viewport_meta_enabled;
 509
 510   prefs.main_frame_resizes_are_orientation_changes =
 511       command_line.HasSwitch(switches::kMainFrameResizesAreOrientationChanges);
 512
 513   prefs.image_color_profiles_enabled =
 514       command_line.HasSwitch(switches::kEnableImageColorProfiles);
 515
 516   prefs.spatial_navigation_enabled = command_line.HasSwitch(
 517       switches::kEnableSpatialNavigation);
 518
 519   prefs.disable_reading_from_canvas = command_line.HasSwitch(
 520       switches::kDisableReadingFromCanvas);
 521
 522   prefs.strict_mixed_content_checking = command_line.HasSwitch(
 523       switches::kEnableStrictMixedContentChecking);
 524
 525   prefs.strict_powerful_feature_restrictions = command_line.HasSwitch(
 526       switches::kEnableStrictPowerfulFeatureRestrictions);
 527
 528   const std::string blockable_mixed_content_group =
 529       base::FieldTrialList::FindFullName("BlockableMixedContent");
 530   prefs.strictly_block_blockable_mixed_content =
 531       blockable_mixed_content_group == "StrictlyBlockBlockableMixedContent";
 532
 533   const std::string plugin_mixed_content_status =
 534       base::FieldTrialList::FindFullName("PluginMixedContentStatus");
 535   prefs.block_mixed_plugin_content =
 536       plugin_mixed_content_status == "BlockableMixedContent";
 537
 538   prefs.v8_cache_options = GetV8CacheOptions();
 539
 540   GetContentClient()->browser()->OverrideWebkitPrefs(this, &prefs);
 541   return prefs;
 542 }
 543
 544 void RenderViewHostImpl::SuppressDialogsUntilSwapOut() {
 545   Send(new ViewMsg_SuppressDialogsUntilSwapOut(GetRoutingID()));
 546 }
 547
 548 void RenderViewHostImpl::ClosePage() {
 549   is_waiting_for_close_ack_ = true;
 550   StartHangMonitorTimeout(TimeDelta::FromMilliseconds(kUnloadTimeoutMS));
 551
 552   if (IsRenderViewLive()) {
 553     // Since we are sending an IPC message to the renderer, increase the event
 554     // count to prevent the hang monitor timeout from being stopped by input
 555     // event acknowledgements.
 556     increment_in_flight_event_count();
 557
 558     // TODO(creis): Should this be moved to Shutdown?  It may not be called for
 559     // RenderViewHosts that have been swapped out.
 560     NotificationService::current()->Notify(
 561         NOTIFICATION_RENDER_VIEW_HOST_WILL_CLOSE_RENDER_VIEW,
 562         Source<RenderViewHost>(this),
 563         NotificationService::NoDetails());
 564
 565     Send(new ViewMsg_ClosePage(GetRoutingID()));
 566   } else {
 567     // This RenderViewHost doesn't have a live renderer, so just skip the unload
 568     // event and close the page.
 569     ClosePageIgnoringUnloadEvents();
 570   }
 571 }
 572
 573 void RenderViewHostImpl::ClosePageIgnoringUnloadEvents() {
 574   StopHangMonitorTimeout();
 575   is_waiting_for_close_ack_ = false;
 576
 577   sudden_termination_allowed_ = true;
 578   delegate_->Close(this);
 579 }
 580
 581 #if defined(OS_ANDROID)
 582 void RenderViewHostImpl::ActivateNearestFindResult(int request_id,
 583                                                    float x,
 584                                                    float y) {
 585   Send(new InputMsg_ActivateNearestFindResult(GetRoutingID(),
 586                                               request_id, x, y));
 587 }
 588
 589 void RenderViewHostImpl::RequestFindMatchRects(int current_version) {
 590   Send(new ViewMsg_FindMatchRects(GetRoutingID(), current_version));
 591 }
 592 #endif
 593
 594 void RenderViewHostImpl::RenderProcessExited(RenderProcessHost* host,
 595                                              base::TerminationStatus status,
 596                                              int exit_code) {
 597   if (!renderer_initialized())
 598     return;
 599
 600   RenderWidgetHostImpl::RendererExited(status, exit_code);
 601   delegate_->RenderViewTerminated(this, status, exit_code);
 602 }
 603
 604 void RenderViewHostImpl::DragTargetDragEnter(
 605     const DropData& drop_data,
 606     const gfx::Point& client_pt,
 607     const gfx::Point& screen_pt,
 608     WebDragOperationsMask operations_allowed,
 609     int key_modifiers) {
 610   const int renderer_id = GetProcess()->GetID();
 611   ChildProcessSecurityPolicyImpl* policy =
 612       ChildProcessSecurityPolicyImpl::GetInstance();
 613
 614 #if defined(OS_CHROMEOS)
 615   // The externalfile:// scheme is used in Chrome OS to open external files in a
 616   // browser tab.
 617   if (drop_data.url.SchemeIs(content::kExternalFileScheme))
 618     policy->GrantRequestURL(renderer_id, drop_data.url);
 619 #endif
 620
 621   // The URL could have been cobbled together from any highlighted text string,
 622   // and can't be interpreted as a capability.
 623   DropData filtered_data(drop_data);
 624   GetProcess()->FilterURL(true, &filtered_data.url);
 625   if (drop_data.did_originate_from_renderer) {
 626     filtered_data.filenames.clear();
 627   }
 628
 629   // The filenames vector, on the other hand, does represent a capability to
 630   // access the given files.
 631   storage::IsolatedContext::FileInfoSet files;
 632   for (std::vector<ui::FileInfo>::iterator iter(
 633            filtered_data.filenames.begin());
 634        iter != filtered_data.filenames.end();
 635        ++iter) {
 636     // A dragged file may wind up as the value of an input element, or it
 637     // may be used as the target of a navigation instead.  We don't know
 638     // which will happen at this point, so generously grant both access
 639     // and request permissions to the specific file to cover both cases.
 640     // We do not give it the permission to request all file:// URLs.
 641
 642     // Make sure we have the same display_name as the one we register.
 643     if (iter->display_name.empty()) {
 644       std::string name;
 645       files.AddPath(iter->path, &name);
 646       iter->display_name = base::FilePath::FromUTF8Unsafe(name);
 647     } else {
 648       files.AddPathWithName(iter->path, iter->display_name.AsUTF8Unsafe());
 649     }
 650
 651     policy->GrantRequestSpecificFileURL(renderer_id,
 652                                         net::FilePathToFileURL(iter->path));
 653
 654     // If the renderer already has permission to read these paths, we don't need
 655     // to re-grant them. This prevents problems with DnD for files in the CrOS
 656     // file manager--the file manager already had read/write access to those
 657     // directories, but dragging a file would cause the read/write access to be
 658     // overwritten with read-only access, making them impossible to delete or
 659     // rename until the renderer was killed.
 660     if (!policy->CanReadFile(renderer_id, iter->path))
 661       policy->GrantReadFile(renderer_id, iter->path);
 662   }
 663
 664   storage::IsolatedContext* isolated_context =
 665       storage::IsolatedContext::GetInstance();
 666   DCHECK(isolated_context);
 667   std::string filesystem_id = isolated_context->RegisterDraggedFileSystem(
 668       files);
 669   if (!filesystem_id.empty()) {
 670     // Grant the permission iff the ID is valid.
 671     policy->GrantReadFileSystem(renderer_id, filesystem_id);
 672   }
 673   filtered_data.filesystem_id = base::UTF8ToUTF16(filesystem_id);
 674
 675   storage::FileSystemContext* file_system_context =
 676       BrowserContext::GetStoragePartition(GetProcess()->GetBrowserContext(),
 677                                           GetSiteInstance())
 678           ->GetFileSystemContext();
 679   for (size_t i = 0; i < filtered_data.file_system_files.size(); ++i) {
 680     storage::FileSystemURL file_system_url =
 681         file_system_context->CrackURL(filtered_data.file_system_files[i].url);
 682
 683     std::string register_name;
 684     std::string filesystem_id = isolated_context->RegisterFileSystemForPath(
 685         file_system_url.type(), file_system_url.filesystem_id(),
 686         file_system_url.path(), &register_name);
 687     policy->GrantReadFileSystem(renderer_id, filesystem_id);
 688
 689     // Note: We are using the origin URL provided by the sender here. It may be
 690     // different from the receiver's.
 691     filtered_data.file_system_files[i].url =
 692         GURL(storage::GetIsolatedFileSystemRootURIString(
 693                  file_system_url.origin(), filesystem_id, std::string())
 694                  .append(register_name));
 695   }
 696
 697   Send(new DragMsg_TargetDragEnter(GetRoutingID(), filtered_data, client_pt,
 698                                    screen_pt, operations_allowed,
 699                                    key_modifiers));
 700 }
 701
 702 void RenderViewHostImpl::DragTargetDragOver(
 703     const gfx::Point& client_pt,
 704     const gfx::Point& screen_pt,
 705     WebDragOperationsMask operations_allowed,
 706     int key_modifiers) {
 707   Send(new DragMsg_TargetDragOver(GetRoutingID(), client_pt, screen_pt,
 708                                   operations_allowed, key_modifiers));
 709 }
 710
 711 void RenderViewHostImpl::DragTargetDragLeave() {
 712   Send(new DragMsg_TargetDragLeave(GetRoutingID()));
 713 }
 714
 715 void RenderViewHostImpl::DragTargetDrop(
 716     const gfx::Point& client_pt,
 717     const gfx::Point& screen_pt,
 718     int key_modifiers) {
 719   Send(new DragMsg_TargetDrop(GetRoutingID(), client_pt, screen_pt,
 720                               key_modifiers));
 721 }
 722
 723 void RenderViewHostImpl::DragSourceEndedAt(
 724     int client_x, int client_y, int screen_x, int screen_y,
 725     WebDragOperation operation) {
 726   Send(new DragMsg_SourceEnded(GetRoutingID(),
 727                                gfx::Point(client_x, client_y),
 728                                gfx::Point(screen_x, screen_y),
 729                                operation));
 730 }
 731
 732 void RenderViewHostImpl::DragSourceSystemDragEnded() {
 733   Send(new DragMsg_SourceSystemDragEnded(GetRoutingID()));
 734 }
 735
 736 RenderFrameHost* RenderViewHostImpl::GetMainFrame() {
 737   return RenderFrameHost::FromID(GetProcess()->GetID(), main_frame_routing_id_);
 738 }
 739
 740 void RenderViewHostImpl::AllowBindings(int bindings_flags) {
 741   // Never grant any bindings to browser plugin guests.
 742   if (GetProcess()->IsForGuestsOnly()) {
 743     NOTREACHED() << "Never grant bindings to a guest process.";
 744     return;
 745   }
 746
 747   // Ensure we aren't granting WebUI bindings to a process that has already
 748   // been used for non-privileged views.
 749   if (bindings_flags & BINDINGS_POLICY_WEB_UI &&
 750       GetProcess()->HasConnection() &&
 751       !ChildProcessSecurityPolicyImpl::GetInstance()->HasWebUIBindings(
 752           GetProcess()->GetID())) {
 753     // This process has no bindings yet. Make sure it does not have more
 754     // than this single active view.
 755     // --single-process only has one renderer.
 756     if (GetProcess()->GetActiveViewCount() > 1 &&
 757         !base::CommandLine::ForCurrentProcess()->HasSwitch(
 758             switches::kSingleProcess))
 759       return;
 760   }
 761
 762   if (bindings_flags & BINDINGS_POLICY_WEB_UI) {
 763     ChildProcessSecurityPolicyImpl::GetInstance()->GrantWebUIBindings(
 764         GetProcess()->GetID());
 765   }
 766
 767   enabled_bindings_ |= bindings_flags;
 768   if (renderer_initialized())
 769     Send(new ViewMsg_AllowBindings(GetRoutingID(), enabled_bindings_));
 770 }
 771
 772 int RenderViewHostImpl::GetEnabledBindings() const {
 773   return enabled_bindings_;
 774 }
 775
 776 void RenderViewHostImpl::SetWebUIProperty(const std::string& name,
 777                                           const std::string& value) {
 778   // This is a sanity check before telling the renderer to enable the property.
 779   // It could lie and send the corresponding IPC messages anyway, but we will
 780   // not act on them if enabled_bindings_ doesn't agree. If we get here without
 781   // WebUI bindings, kill the renderer process.
 782   if (enabled_bindings_ & BINDINGS_POLICY_WEB_UI) {
 783     Send(new ViewMsg_SetWebUIProperty(GetRoutingID(), name, value));
 784   } else {
 785     RecordAction(
 786         base::UserMetricsAction("BindingsMismatchTerminate_RVH_WebUI"));
 787     GetProcess()->Shutdown(content::RESULT_CODE_KILLED, false);
 788   }
 789 }
 790
 791 void RenderViewHostImpl::GotFocus() {
 792   RenderWidgetHostImpl::GotFocus();  // Notifies the renderer it got focus.
 793
 794   RenderViewHostDelegateView* view = delegate_->GetDelegateView();
 795   if (view)
 796     view->GotFocus();
 797 }
 798
 799 void RenderViewHostImpl::LostCapture() {
 800   RenderWidgetHostImpl::LostCapture();
 801   delegate_->LostCapture();
 802 }
 803
 804 void RenderViewHostImpl::LostMouseLock() {
 805   RenderWidgetHostImpl::LostMouseLock();
 806   delegate_->LostMouseLock();
 807 }
 808
 809 void RenderViewHostImpl::SetInitialFocus(bool reverse) {
 810   Send(new ViewMsg_SetInitialFocus(GetRoutingID(), reverse));
 811 }
 812
 813 void RenderViewHostImpl::FilesSelectedInChooser(
 814     const std::vector<content::FileChooserFileInfo>& files,
 815     FileChooserParams::Mode permissions) {
 816   storage::FileSystemContext* const file_system_context =
 817       BrowserContext::GetStoragePartition(GetProcess()->GetBrowserContext(),
 818                                           GetSiteInstance())
 819           ->GetFileSystemContext();
 820   // Grant the security access requested to the given files.
 821   for (size_t i = 0; i < files.size(); ++i) {
 822     const content::FileChooserFileInfo& file = files[i];
 823     if (permissions == FileChooserParams::Save) {
 824       ChildProcessSecurityPolicyImpl::GetInstance()->GrantCreateReadWriteFile(
 825           GetProcess()->GetID(), file.file_path);
 826     } else {
 827       ChildProcessSecurityPolicyImpl::GetInstance()->GrantReadFile(
 828           GetProcess()->GetID(), file.file_path);
 829     }
 830     if (file.file_system_url.is_valid()) {
 831       ChildProcessSecurityPolicyImpl::GetInstance()->GrantReadFileSystem(
 832           GetProcess()->GetID(),
 833           file_system_context->CrackURL(file.file_system_url)
 834           .mount_filesystem_id());
 835     }
 836   }
 837   Send(new ViewMsg_RunFileChooserResponse(GetRoutingID(), files));
 838 }
 839
 840 void RenderViewHostImpl::DirectoryEnumerationFinished(
 841     int request_id,
 842     const std::vector<base::FilePath>& files) {
 843   // Grant the security access requested to the given files.
 844   for (std::vector<base::FilePath>::const_iterator file = files.begin();
 845        file != files.end(); ++file) {
 846     ChildProcessSecurityPolicyImpl::GetInstance()->GrantReadFile(
 847         GetProcess()->GetID(), *file);
 848   }
 849   Send(new ViewMsg_EnumerateDirectoryResponse(GetRoutingID(),
 850                                               request_id,
 851                                               files));
 852 }
 853
 854 void RenderViewHostImpl::SetIsLoading(bool is_loading) {
 855   if (ResourceDispatcherHostImpl::Get()) {
 856     BrowserThread::PostTask(
 857         BrowserThread::IO,
 858         FROM_HERE,
 859         base::Bind(&ResourceDispatcherHostImpl::OnRenderViewHostSetIsLoading,
 860                    base::Unretained(ResourceDispatcherHostImpl::Get()),
 861                    GetProcess()->GetID(),
 862                    GetRoutingID(),
 863                    is_loading));
 864   }
 865   RenderWidgetHostImpl::SetIsLoading(is_loading);
 866 }
 867
 868 void RenderViewHostImpl::LoadStateChanged(
 869     const GURL& url,
 870     const net::LoadStateWithParam& load_state,
 871     uint64 upload_position,
 872     uint64 upload_size) {
 873   delegate_->LoadStateChanged(url, load_state, upload_position, upload_size);
 874 }
 875
 876 bool RenderViewHostImpl::SuddenTerminationAllowed() const {
 877   return sudden_termination_allowed_ ||
 878       GetProcess()->SuddenTerminationAllowed();
 879 }
 880
 881 ///////////////////////////////////////////////////////////////////////////////
 882 // RenderViewHostImpl, IPC message handlers:
 883
 884 bool RenderViewHostImpl::OnMessageReceived(const IPC::Message& msg) {
 885   if (!BrowserMessageFilter::CheckCanDispatchOnUI(msg, this))
 886     return true;
 887
 888   // Filter out most IPC messages if this renderer is swapped out.
 889   // We still want to handle certain ACKs to keep our state consistent.
 890   if (is_swapped_out_) {
 891     if (!SwappedOutMessages::CanHandleWhileSwappedOut(msg)) {
 892       // If this is a synchronous message and we decided not to handle it,
 893       // we must send an error reply, or else the renderer will be stuck
 894       // and won't respond to future requests.
 895       if (msg.is_sync()) {
 896         IPC::Message* reply = IPC::SyncMessage::GenerateReply(&msg);
 897         reply->set_reply_error();
 898         Send(reply);
 899       }
 900       // Don't continue looking for someone to handle it.
 901       return true;
 902     }
 903   }
 904
 905   if (delegate_->OnMessageReceived(this, msg))
 906     return true;
 907
 908   bool handled = true;
 909   IPC_BEGIN_MESSAGE_MAP(RenderViewHostImpl, msg)
 910     IPC_MESSAGE_HANDLER(FrameHostMsg_RenderProcessGone, OnRenderProcessGone)
 911     IPC_MESSAGE_HANDLER(ViewHostMsg_ShowView, OnShowView)
 912     IPC_MESSAGE_HANDLER(ViewHostMsg_ShowWidget, OnShowWidget)
 913     IPC_MESSAGE_HANDLER(ViewHostMsg_ShowFullscreenWidget,
 914                         OnShowFullscreenWidget)
 915     IPC_MESSAGE_HANDLER(ViewHostMsg_RenderViewReady, OnRenderViewReady)
 916     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateState, OnUpdateState)
 917     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateTargetURL, OnUpdateTargetURL)
 918     IPC_MESSAGE_HANDLER(ViewHostMsg_Close, OnClose)
 919     IPC_MESSAGE_HANDLER(ViewHostMsg_RequestMove, OnRequestMove)
 920     IPC_MESSAGE_HANDLER(ViewHostMsg_DocumentAvailableInMainFrame,
 921                         OnDocumentAvailableInMainFrame)
 922     IPC_MESSAGE_HANDLER(ViewHostMsg_DidContentsPreferredSizeChange,
 923                         OnDidContentsPreferredSizeChange)
 924     IPC_MESSAGE_HANDLER(ViewHostMsg_RouteCloseEvent,
 925                         OnRouteCloseEvent)
 926     IPC_MESSAGE_HANDLER(DragHostMsg_StartDragging, OnStartDragging)
 927     IPC_MESSAGE_HANDLER(DragHostMsg_UpdateDragCursor, OnUpdateDragCursor)
 928     IPC_MESSAGE_HANDLER(ViewHostMsg_TakeFocus, OnTakeFocus)
 929     IPC_MESSAGE_HANDLER(ViewHostMsg_FocusedNodeChanged, OnFocusedNodeChanged)
 930     IPC_MESSAGE_HANDLER(ViewHostMsg_ClosePage_ACK, OnClosePageACK)
 931     IPC_MESSAGE_HANDLER(ViewHostMsg_DidZoomURL, OnDidZoomURL)
 932     IPC_MESSAGE_HANDLER(ViewHostMsg_PageScaleFactorIsOneChanged,
 933                         OnPageScaleFactorIsOneChanged)
 934     IPC_MESSAGE_HANDLER(ViewHostMsg_RunFileChooser, OnRunFileChooser)
 935     IPC_MESSAGE_HANDLER(ViewHostMsg_FocusedNodeTouched, OnFocusedNodeTouched)
 936     // Have the super handle all other messages.
 937     IPC_MESSAGE_UNHANDLED(
 938         handled = RenderWidgetHostImpl::OnMessageReceived(msg))
 939   IPC_END_MESSAGE_MAP()
 940
 941   return handled;
 942 }
 943
 944 void RenderViewHostImpl::Init() {
 945   RenderWidgetHostImpl::Init();
 946 }
 947
 948 void RenderViewHostImpl::Shutdown() {
 949   // We can't release the SessionStorageNamespace until our peer
 950   // in the renderer has wound down.
 951   if (GetProcess()->HasConnection()) {
 952     RenderProcessHostImpl::ReleaseOnCloseACK(
 953         GetProcess(),
 954         delegate_->GetSessionStorageNamespaceMap(),
 955         GetRoutingID());
 956   }
 957
 958   RenderWidgetHostImpl::Shutdown();
 959 }
 960
 961 void RenderViewHostImpl::WasHidden() {
 962   if (ResourceDispatcherHostImpl::Get()) {
 963     BrowserThread::PostTask(
 964         BrowserThread::IO, FROM_HERE,
 965         base::Bind(&ResourceDispatcherHostImpl::OnRenderViewHostWasHidden,
 966                    base::Unretained(ResourceDispatcherHostImpl::Get()),
 967                    GetProcess()->GetID(), GetRoutingID()));
 968   }
 969
 970   RenderWidgetHostImpl::WasHidden();
 971 }
 972
 973 void RenderViewHostImpl::WasShown(const ui::LatencyInfo& latency_info) {
 974   if (ResourceDispatcherHostImpl::Get()) {
 975     BrowserThread::PostTask(
 976         BrowserThread::IO, FROM_HERE,
 977         base::Bind(&ResourceDispatcherHostImpl::OnRenderViewHostWasShown,
 978                    base::Unretained(ResourceDispatcherHostImpl::Get()),
 979                    GetProcess()->GetID(), GetRoutingID()));
 980   }
 981
 982   RenderWidgetHostImpl::WasShown(latency_info);
 983 }
 984
 985 bool RenderViewHostImpl::IsRenderView() const {
 986   return true;
 987 }
 988
 989 void RenderViewHostImpl::CreateNewWindow(
 990     int route_id,
 991     int main_frame_route_id,
 992     const ViewHostMsg_CreateWindow_Params& params,
 993     SessionStorageNamespace* session_storage_namespace) {
 994   ViewHostMsg_CreateWindow_Params validated_params(params);
 995   GetProcess()->FilterURL(false, &validated_params.target_url);
 996   GetProcess()->FilterURL(false, &validated_params.opener_url);
 997   GetProcess()->FilterURL(true, &validated_params.opener_security_origin);
 998
 999   delegate_->CreateNewWindow(GetSiteInstance(), route_id, main_frame_route_id,
1000                              validated_params, session_storage_namespace);
1001 }
1002
1003 void RenderViewHostImpl::CreateNewWidget(int route_id,
1004                                      blink::WebPopupType popup_type) {
1005   delegate_->CreateNewWidget(GetProcess()->GetID(), route_id, popup_type);
1006 }
1007
1008 void RenderViewHostImpl::CreateNewFullscreenWidget(int route_id) {
1009   delegate_->CreateNewFullscreenWidget(GetProcess()->GetID(), route_id);
1010 }
1011
1012 void RenderViewHostImpl::OnShowView(int route_id,
1013                                     WindowOpenDisposition disposition,
1014                                     const gfx::Rect& initial_rect,
1015                                     bool user_gesture) {
1016   delegate_->ShowCreatedWindow(route_id, disposition, initial_rect,
1017                                user_gesture);
1018   Send(new ViewMsg_Move_ACK(route_id));
1019 }
1020
1021 void RenderViewHostImpl::OnShowWidget(int route_id,
1022                                       const gfx::Rect& initial_rect) {
1023   if (is_active_)
1024     delegate_->ShowCreatedWidget(route_id, initial_rect);
1025   Send(new ViewMsg_Move_ACK(route_id));
1026 }
1027
1028 void RenderViewHostImpl::OnShowFullscreenWidget(int route_id) {
1029   if (is_active_)
1030     delegate_->ShowCreatedFullscreenWidget(route_id);
1031   Send(new ViewMsg_Move_ACK(route_id));
1032 }
1033
1034 void RenderViewHostImpl::OnRenderViewReady() {
1035   render_view_termination_status_ = base::TERMINATION_STATUS_STILL_RUNNING;
1036   SendScreenRects();
1037   WasResized();
1038   delegate_->RenderViewReady(this);
1039 }
1040
1041 void RenderViewHostImpl::OnRenderProcessGone(int status, int exit_code) {
1042   // Do nothing, otherwise RenderWidgetHostImpl will assume it is not a
1043   // RenderViewHostImpl and destroy itself.
1044   // TODO(nasko): Remove this hack once RenderViewHost and RenderWidgetHost are
1045   // decoupled.
1046 }
1047
1048 void RenderViewHostImpl::OnUpdateState(int32 page_id, const PageState& state) {
1049   // If the following DCHECK fails, you have encountered a tricky edge-case that
1050   // has evaded reproduction for a very long time. Please report what you were
1051   // doing on http://crbug.com/407376, whether or not you can reproduce the
1052   // failure.
1053   DCHECK_EQ(page_id, page_id_);
1054
1055   // Without this check, the renderer can trick the browser into using
1056   // filenames it can't access in a future session restore.
1057   if (!CanAccessFilesOfPageState(state)) {
1058     bad_message::ReceivedBadMessage(
1059         GetProcess(), bad_message::RVH_CAN_ACCESS_FILES_OF_PAGE_STATE);
1060     return;
1061   }
1062
1063   delegate_->UpdateState(this, page_id, state);
1064 }
1065
1066 void RenderViewHostImpl::OnUpdateTargetURL(const GURL& url) {
1067   if (is_active_)
1068     delegate_->UpdateTargetURL(this, url);
1069
1070   // Send a notification back to the renderer that we are ready to
1071   // receive more target urls.
1072   Send(new ViewMsg_UpdateTargetURL_ACK(GetRoutingID()));
1073 }
1074
1075 void RenderViewHostImpl::OnClose() {
1076   // If the renderer is telling us to close, it has already run the unload
1077   // events, and we can take the fast path.
1078   ClosePageIgnoringUnloadEvents();
1079 }
1080
1081 void RenderViewHostImpl::OnRequestMove(const gfx::Rect& pos) {
1082   if (is_active_)
1083     delegate_->RequestMove(pos);
1084   Send(new ViewMsg_Move_ACK(GetRoutingID()));
1085 }
1086
1087 void RenderViewHostImpl::OnDocumentAvailableInMainFrame(
1088     bool uses_temporary_zoom_level) {
1089   delegate_->DocumentAvailableInMainFrame(this);
1090
1091   if (!uses_temporary_zoom_level)
1092     return;
1093
1094   HostZoomMapImpl* host_zoom_map =
1095       static_cast<HostZoomMapImpl*>(HostZoomMap::Get(GetSiteInstance()));
1096   host_zoom_map->SetTemporaryZoomLevel(GetProcess()->GetID(),
1097                                        GetRoutingID(),
1098                                        host_zoom_map->GetDefaultZoomLevel());
1099 }
1100
1101 void RenderViewHostImpl::OnDidContentsPreferredSizeChange(
1102     const gfx::Size& new_size) {
1103   delegate_->UpdatePreferredSize(new_size);
1104 }
1105
1106 void RenderViewHostImpl::OnRenderAutoResized(const gfx::Size& new_size) {
1107   delegate_->ResizeDueToAutoResize(new_size);
1108 }
1109
1110 void RenderViewHostImpl::OnRouteCloseEvent() {
1111   // Have the delegate route this to the active RenderViewHost.
1112   delegate_->RouteCloseEvent(this);
1113 }
1114
1115 void RenderViewHostImpl::OnStartDragging(
1116     const DropData& drop_data,
1117     WebDragOperationsMask drag_operations_mask,
1118     const SkBitmap& bitmap,
1119     const gfx::Vector2d& bitmap_offset_in_dip,
1120     const DragEventSourceInfo& event_info) {
1121   RenderViewHostDelegateView* view = delegate_->GetDelegateView();
1122   if (!view)
1123     return;
1124
1125   DropData filtered_data(drop_data);
1126   RenderProcessHost* process = GetProcess();
1127   ChildProcessSecurityPolicyImpl* policy =
1128       ChildProcessSecurityPolicyImpl::GetInstance();
1129
1130   // Allow drag of Javascript URLs to enable bookmarklet drag to bookmark bar.
1131   if (!filtered_data.url.SchemeIs(url::kJavaScriptScheme))
1132     process->FilterURL(true, &filtered_data.url);
1133   process->FilterURL(false, &filtered_data.html_base_url);
1134   // Filter out any paths that the renderer didn't have access to. This prevents
1135   // the following attack on a malicious renderer:
1136   // 1. StartDragging IPC sent with renderer-specified filesystem paths that it
1137   //    doesn't have read permissions for.
1138   // 2. We initiate a native DnD operation.
1139   // 3. DnD operation immediately ends since mouse is not held down. DnD events
1140   //    still fire though, which causes read permissions to be granted to the
1141   //    renderer for any file paths in the drop.
1142   filtered_data.filenames.clear();
1143   for (std::vector<ui::FileInfo>::const_iterator it =
1144            drop_data.filenames.begin();
1145        it != drop_data.filenames.end();
1146        ++it) {
1147     if (policy->CanReadFile(GetProcess()->GetID(), it->path))
1148       filtered_data.filenames.push_back(*it);
1149   }
1150
1151   storage::FileSystemContext* file_system_context =
1152       BrowserContext::GetStoragePartition(GetProcess()->GetBrowserContext(),
1153                                           GetSiteInstance())
1154           ->GetFileSystemContext();
1155   filtered_data.file_system_files.clear();
1156   for (size_t i = 0; i < drop_data.file_system_files.size(); ++i) {
1157     storage::FileSystemURL file_system_url =
1158         file_system_context->CrackURL(drop_data.file_system_files[i].url);
1159     if (policy->CanReadFileSystemFile(GetProcess()->GetID(), file_system_url))
1160       filtered_data.file_system_files.push_back(drop_data.file_system_files[i]);
1161   }
1162
1163   float scale = GetScaleFactorForView(GetView());
1164   gfx::ImageSkia image(gfx::ImageSkiaRep(bitmap, scale));
1165   view->StartDragging(filtered_data, drag_operations_mask, image,
1166       bitmap_offset_in_dip, event_info);
1167 }
1168
1169 void RenderViewHostImpl::OnUpdateDragCursor(WebDragOperation current_op) {
1170   RenderViewHostDelegateView* view = delegate_->GetDelegateView();
1171   if (view)
1172     view->UpdateDragCursor(current_op);
1173 }
1174
1175 void RenderViewHostImpl::OnTakeFocus(bool reverse) {
1176   RenderViewHostDelegateView* view = delegate_->GetDelegateView();
1177   if (view)
1178     view->TakeFocus(reverse);
1179 }
1180
1181 void RenderViewHostImpl::OnFocusedNodeChanged(
1182     bool is_editable_node,
1183     const gfx::Rect& node_bounds_in_viewport) {
1184   is_focused_element_editable_ = is_editable_node;
1185   if (view_)
1186     view_->FocusedNodeChanged(is_editable_node);
1187 #if defined(OS_WIN)
1188   if (!is_editable_node && virtual_keyboard_requested_) {
1189     virtual_keyboard_requested_ = false;
1190     delegate_->SetIsVirtualKeyboardRequested(false);
1191     BrowserThread::PostDelayedTask(
1192         BrowserThread::UI, FROM_HERE,
1193         base::Bind(base::IgnoreResult(&DismissVirtualKeyboardTask)),
1194         TimeDelta::FromMilliseconds(kVirtualKeyboardDisplayWaitTimeoutMs));
1195   }
1196 #endif
1197
1198   // Convert node_bounds to screen coordinates.
1199   gfx::Rect view_bounds_in_screen = view_->GetViewBounds();
1200   gfx::Point origin = node_bounds_in_viewport.origin();
1201   origin.Offset(view_bounds_in_screen.x(), view_bounds_in_screen.y());
1202   gfx::Rect node_bounds_in_screen(origin.x(), origin.y(),
1203                                   node_bounds_in_viewport.width(),
1204                                   node_bounds_in_viewport.height());
1205   FocusedNodeDetails details = {is_editable_node, node_bounds_in_screen};
1206   NotificationService::current()->Notify(NOTIFICATION_FOCUS_CHANGED_IN_PAGE,
1207                                          Source<RenderViewHost>(this),
1208                                          Details<FocusedNodeDetails>(&details));
1209 }
1210
1211 void RenderViewHostImpl::OnUserGesture() {
1212   delegate_->OnUserGesture();
1213 }
1214
1215 void RenderViewHostImpl::OnClosePageACK() {
1216   decrement_in_flight_event_count();
1217   ClosePageIgnoringUnloadEvents();
1218 }
1219
1220 void RenderViewHostImpl::NotifyRendererUnresponsive() {
1221   delegate_->RendererUnresponsive(this);
1222 }
1223
1224 void RenderViewHostImpl::NotifyRendererResponsive() {
1225   delegate_->RendererResponsive(this);
1226 }
1227
1228 void RenderViewHostImpl::RequestToLockMouse(bool user_gesture,
1229                                             bool last_unlocked_by_target) {
1230   delegate_->RequestToLockMouse(user_gesture, last_unlocked_by_target);
1231 }
1232
1233 bool RenderViewHostImpl::IsFullscreenGranted() const {
1234   return delegate_->IsFullscreenForCurrentTab();
1235 }
1236
1237 blink::WebDisplayMode RenderViewHostImpl::GetDisplayMode() const {
1238   return delegate_->GetDisplayMode();
1239 }
1240
1241 void RenderViewHostImpl::OnFocus() {
1242   // Note: We allow focus and blur from swapped out RenderViewHosts, even when
1243   // the active RenderViewHost is in a different BrowsingInstance (e.g., WebUI).
1244   delegate_->Activate();
1245 }
1246
1247 void RenderViewHostImpl::OnBlur() {
1248   delegate_->Deactivate();
1249 }
1250
1251 gfx::Rect RenderViewHostImpl::GetRootWindowResizerRect() const {
1252   return delegate_->GetRootWindowResizerRect();
1253 }
1254
1255 void RenderViewHostImpl::ForwardMouseEvent(
1256     const blink::WebMouseEvent& mouse_event) {
1257   RenderWidgetHostImpl::ForwardMouseEvent(mouse_event);
1258   if (mouse_event.type == WebInputEvent::MouseWheel && ignore_input_events())
1259     delegate_->OnIgnoredUIEvent();
1260 }
1261
1262 void RenderViewHostImpl::ForwardKeyboardEvent(
1263     const NativeWebKeyboardEvent& key_event) {
1264   if (ignore_input_events()) {
1265     if (key_event.type == WebInputEvent::RawKeyDown)
1266       delegate_->OnIgnoredUIEvent();
1267     return;
1268   }
1269   RenderWidgetHostImpl::ForwardKeyboardEvent(key_event);
1270 }
1271
1272 void RenderViewHostImpl::OnTextSurroundingSelectionResponse(
1273     const base::string16& content,
1274     size_t start_offset,
1275     size_t end_offset) {
1276   if (!view_)
1277     return;
1278   view_->OnTextSurroundingSelectionResponse(content, start_offset, end_offset);
1279 }
1280
1281 WebPreferences RenderViewHostImpl::GetWebkitPreferences() {
1282   if (!web_preferences_.get()) {
1283     OnWebkitPreferencesChanged();
1284   }
1285   return *web_preferences_;
1286 }
1287
1288 void RenderViewHostImpl::UpdateWebkitPreferences(const WebPreferences& prefs) {
1289   web_preferences_.reset(new WebPreferences(prefs));
1290   Send(new ViewMsg_UpdateWebPreferences(GetRoutingID(), prefs));
1291 }
1292
1293 void RenderViewHostImpl::OnWebkitPreferencesChanged() {
1294   // This is defensive code to avoid infinite loops due to code run inside
1295   // UpdateWebkitPreferences() accidentally updating more preferences and thus
1296   // calling back into this code. See crbug.com/398751 for one past example.
1297   if (updating_web_preferences_)
1298     return;
1299   updating_web_preferences_ = true;
1300   UpdateWebkitPreferences(ComputeWebkitPrefs());
1301   updating_web_preferences_ = false;
1302 }
1303
1304 void RenderViewHostImpl::ClearFocusedElement() {
1305   is_focused_element_editable_ = false;
1306   Send(new ViewMsg_ClearFocusedElement(GetRoutingID()));
1307 }
1308
1309 bool RenderViewHostImpl::IsFocusedElementEditable() {
1310   return is_focused_element_editable_;
1311 }
1312
1313 void RenderViewHostImpl::Zoom(PageZoom zoom) {
1314   Send(new ViewMsg_Zoom(GetRoutingID(), zoom));
1315 }
1316
1317 void RenderViewHostImpl::DisableScrollbarsForThreshold(const gfx::Size& size) {
1318   Send(new ViewMsg_DisableScrollbarsForSmallWindows(GetRoutingID(), size));
1319 }
1320
1321 void RenderViewHostImpl::EnablePreferredSizeMode() {
1322   Send(new ViewMsg_EnablePreferredSizeChangedMode(GetRoutingID()));
1323 }
1324
1325 void RenderViewHostImpl::EnableAutoResize(const gfx::Size& min_size,
1326                                           const gfx::Size& max_size) {
1327   SetAutoResize(true, min_size, max_size);
1328   Send(new ViewMsg_EnableAutoResize(GetRoutingID(), min_size, max_size));
1329 }
1330
1331 void RenderViewHostImpl::DisableAutoResize(const gfx::Size& new_size) {
1332   SetAutoResize(false, gfx::Size(), gfx::Size());
1333   Send(new ViewMsg_DisableAutoResize(GetRoutingID(), new_size));
1334   if (!new_size.IsEmpty())
1335     GetView()->SetSize(new_size);
1336 }
1337
1338 void RenderViewHostImpl::CopyImageAt(int x, int y) {
1339   Send(new ViewMsg_CopyImageAt(GetRoutingID(), x, y));
1340 }
1341
1342 void RenderViewHostImpl::SaveImageAt(int x, int y) {
1343   Send(new ViewMsg_SaveImageAt(GetRoutingID(), x, y));
1344 }
1345
1346 void RenderViewHostImpl::ExecuteMediaPlayerActionAtLocation(
1347   const gfx::Point& location, const blink::WebMediaPlayerAction& action) {
1348   Send(new ViewMsg_MediaPlayerActionAt(GetRoutingID(), location, action));
1349 }
1350
1351 void RenderViewHostImpl::ExecutePluginActionAtLocation(
1352   const gfx::Point& location, const blink::WebPluginAction& action) {
1353   Send(new ViewMsg_PluginActionAt(GetRoutingID(), location, action));
1354 }
1355
1356 void RenderViewHostImpl::NotifyMoveOrResizeStarted() {
1357   Send(new ViewMsg_MoveOrResizeStarted(GetRoutingID()));
1358 }
1359
1360 void RenderViewHostImpl::OnDidZoomURL(double zoom_level,
1361                                       const GURL& url) {
1362   HostZoomMapImpl* host_zoom_map =
1363       static_cast<HostZoomMapImpl*>(HostZoomMap::Get(GetSiteInstance()));
1364
1365   host_zoom_map->SetZoomLevelForView(GetProcess()->GetID(),
1366                                      GetRoutingID(),
1367                                      zoom_level,
1368                                      net::GetHostOrSpecFromURL(url));
1369 }
1370
1371 void RenderViewHostImpl::OnPageScaleFactorIsOneChanged(bool is_one) {
1372   if (!GetSiteInstance())
1373     return;
1374   HostZoomMapImpl* host_zoom_map =
1375       static_cast<HostZoomMapImpl*>(HostZoomMap::Get(GetSiteInstance()));
1376   if (!host_zoom_map)
1377     return;
1378   if (!GetProcess())
1379     return;
1380   host_zoom_map->SetPageScaleFactorIsOneForView(GetProcess()->GetID(),
1381                                                 GetRoutingID(), is_one);
1382 }
1383
1384 void RenderViewHostImpl::OnRunFileChooser(const FileChooserParams& params) {
1385   // Do not allow messages with absolute paths in them as this can permit a
1386   // renderer to coerce the browser to perform I/O on a renderer controlled
1387   // path.
1388   if (params.default_file_name != params.default_file_name.BaseName()) {
1389     bad_message::ReceivedBadMessage(GetProcess(),
1390                                     bad_message::RVH_FILE_CHOOSER_PATH);
1391     return;
1392   }
1393
1394   delegate_->RunFileChooser(this, params);
1395 }
1396
1397 void RenderViewHostImpl::OnFocusedNodeTouched(bool editable) {
1398 #if defined(OS_WIN)
1399   if (editable) {
1400     virtual_keyboard_requested_ = base::win::DisplayVirtualKeyboard();
1401     delegate_->SetIsVirtualKeyboardRequested(true);
1402   } else {
1403     virtual_keyboard_requested_ = false;
1404     delegate_->SetIsVirtualKeyboardRequested(false);
1405     base::win::DismissVirtualKeyboard();
1406   }
1407 #endif
1408 }
1409
1410 bool RenderViewHostImpl::CanAccessFilesOfPageState(
1411     const PageState& state) const {
1412   ChildProcessSecurityPolicyImpl* policy =
1413       ChildProcessSecurityPolicyImpl::GetInstance();
1414
1415   const std::vector<base::FilePath>& file_paths = state.GetReferencedFiles();
1416   for (const auto& file : file_paths) {
1417     if (!policy->CanReadFile(GetProcess()->GetID(), file))
1418       return false;
1419   }
1420   return true;
1421 }
1422
1423 void RenderViewHostImpl::GrantFileAccessFromPageState(const PageState& state) {
1424   ChildProcessSecurityPolicyImpl* policy =
1425       ChildProcessSecurityPolicyImpl::GetInstance();
1426
1427   const std::vector<base::FilePath>& file_paths = state.GetReferencedFiles();
1428   for (const auto& file : file_paths) {
1429     if (!policy->CanReadFile(GetProcess()->GetID(), file))
1430       policy->GrantReadFile(GetProcess()->GetID(), file);
1431   }
1432 }
1433
1434 void RenderViewHostImpl::SelectWordAroundCaret() {
1435   Send(new ViewMsg_SelectWordAroundCaret(GetRoutingID()));
1436 }
1437
1438 }  // namespace content