Allow some Android media player implementation to be overridden by embedders.

media/base/android/media_player_bridge.h

Index: media/base/android/media_player_bridge.h
diff --git a/media/base/android/media_player_bridge.h b/media/base/android/media_player_bridge.h
index 4d08bc7248781f6a688790a7debafb7c0cecef58..7dd538577e9ceac0acccf20aa548d85809644389 100644
--- a/media/base/android/media_player_bridge.h
+++ b/media/base/android/media_player_bridge.h
@@ -65,6 +65,8 @@ class MEDIA_EXPORT MediaPlayerBridge : public MediaPlayerAndroid {
   virtual bool CanSeekForward() OVERRIDE;
   virtual bool CanSeekBackward() OVERRIDE;
   virtual bool IsPlayerReady() OVERRIDE;
+  virtual GURL GetUrl() OVERRIDE;
+  virtual GURL GetFirstPartyForCookies() OVERRIDE;
 
  protected:
   void SetMediaPlayer(jobject j_media_player);
@@ -83,10 +85,10 @@ class MEDIA_EXPORT MediaPlayerBridge : public MediaPlayerAndroid {
   virtual void Prepare();
   void OnMediaPrepared();
 
- private:
   // Create the actual android media player.
-  void CreateMediaPlayer();
+  virtual void CreateMediaPlayer();
 
+ private:
   // Set the data source for the media player.
   void SetDataSource(const std::string& url);