Add experimental code behind a flag for Content Size Policy

content/browser/web_contents/web_contents_impl.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 
 #include <stdint.h>
 
 #include <functional>
@@ skipping 36 matching lines @@
 #include "third_party/WebKit/public/platform/WebDragOperation.h"
 #include "ui/base/page_transition_types.h"
 #include "ui/gfx/geometry/rect_f.h"
 #include "ui/gfx/geometry/size.h"
 
 struct ViewHostMsg_DateTimeDialogValue_Params;
 
 namespace content {
 class BrowserPluginEmbedder;
 class BrowserPluginGuest;
+class ContentSizeFrameCounter;
 class DateTimeChooserAndroid;
 class DownloadItem;
 class FindRequestManager;
 class InterstitialPageImpl;
 class JavaScriptDialogManager;
 class LoaderIOThreadNotifier;
 class ManifestManagerHost;
 class MediaWebContentsObserver;
 class PluginContentOriginWhitelist;
 class PowerSaveBlocker;
@@ skipping 677 matching lines @@
 
   // Called by MediaWebContentsObserver when playback starts or stops.  See the
   // WebContentsObserver function stubs for more details.
   void MediaStartedPlaying(const WebContentsObserver::MediaPlayerId& id);
   void MediaStoppedPlaying(const WebContentsObserver::MediaPlayerId& id);
 
   MediaWebContentsObserver* media_web_contents_observer() {
     return media_web_contents_observer_.get();
   }
 
+  ContentSizeFrameCounter* content_size_frame_counter() {
+    return content_size_frame_counter_.get();
+  }
+
   // Update the web contents visibility.
   void UpdateWebContentsVisibility(bool visible);
 
   // Called by FindRequestManager when find replies come in from a renderer
   // process.
   void NotifyFindReply(int request_id,
                        int number_of_matches,
                        const gfx::Rect& selection_rect,
                        int active_match_ordinal,
                        bool final_update);
@@ skipping 617 matching lines @@
   // Created on-demand to mute all audio output from this WebContents.
   std::unique_ptr<WebContentsAudioMuter> audio_muter_;
 
   size_t bluetooth_connected_device_count_;
 
   bool virtual_keyboard_requested_;
 
   // Notifies ResourceDispatcherHostImpl of various events related to loading.
   std::unique_ptr<LoaderIOThreadNotifier> loader_io_thread_notifier_;
 
+  // UI thread state needed for the ContentSizeResourceHandlerManager to
+  // properly enforce size policies.
+  std::unique_ptr<ContentSizeFrameCounter> content_size_frame_counter_;
+
   // Manages media players, CDMs, and power save blockers for media.
   std::unique_ptr<MediaWebContentsObserver> media_web_contents_observer_;
 
 #if defined(ENABLE_PLUGINS)
   // Observes pepper playback changes, and notifies MediaSession.
   std::unique_ptr<PepperPlaybackObserver> pepper_playback_observer_;
 #endif  // defined(ENABLE_PLUGINS)
 
   std::unique_ptr<RenderWidgetHostInputEventRouter> rwh_input_event_router_;
 
@@ skipping 32 matching lines @@
   // Adds/removes a callback called on creation of each new WebContents.
   static void AddCreatedCallbackForTesting(const CreatedCallback& callback);
   static void RemoveCreatedCallbackForTesting(const CreatedCallback& callback);
 
   DISALLOW_COPY_AND_ASSIGN(FriendZone);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_