NOT FOR LANDING Implement WebMediaSession

content/renderer/render_frame_impl.h

Index: content/renderer/render_frame_impl.h
diff --git a/content/renderer/render_frame_impl.h b/content/renderer/render_frame_impl.h
index 321248faff625a6d5b441a9085d3bb8ae8520e85..375d5dc036e8949988c0d57b929118005852e9a7 100644
--- a/content/renderer/render_frame_impl.h
+++ b/content/renderer/render_frame_impl.h
@@ -104,6 +104,7 @@ class PushMessagingDispatcher;
 class RendererAccessibility;
 class RendererCdmManager;
 class RendererMediaPlayerManager;
+class RendererMediaSessionManager;
 class RendererPpapiHost;
 class RenderFrameObserver;
 class RenderViewImpl;
@@ -365,6 +366,8 @@ class CONTENT_EXPORT RenderFrameImpl
       blink::WebMediaPlayerClient* client,
       blink::WebMediaPlayerEncryptedMediaClient* encrypted_client,
       blink::WebContentDecryptionModule* initial_cdm);
+  virtual blink::WebMediaSession* createMediaSession(
+      blink::WebLocalFrame* frame);
   virtual blink::WebApplicationCacheHost* createApplicationCacheHost(
       blink::WebLocalFrame* frame,
       blink::WebApplicationCacheHostClient* client);
@@ -813,6 +816,10 @@ class CONTENT_EXPORT RenderFrameImpl
       blink::WebContentDecryptionModule* initial_cdm);
 
   RendererMediaPlayerManager* GetMediaPlayerManager();
+
+  blink::WebMediaSession* CreateAndroidWebMediaSession();
+
+  RendererMediaSessionManager* GetMediaSessionManager();
 #endif
 
   bool AreSecureCodecsSupported();
@@ -948,6 +955,11 @@ class CONTENT_EXPORT RenderFrameImpl
   // real media player in the browser process. It's okay to use a raw pointer
   // since it's a RenderFrameObserver.
   RendererMediaPlayerManager* media_player_manager_;
+
+  // Manages all media sessions in this render frame for communicating with the
+  // media sessions in the browser process. It's okay to use a raw pointer
+  // since it's a RenderFrameObserver.
+  RendererMediaSessionManager* media_session_manager_;
 #endif
 
 #if defined(ENABLE_BROWSER_CDMS)