Replace missed OVERRIDE with its C++11 counterparts in src/chromecast

chromecast/shell/browser/android/external_video_surface_container_impl.h

Index: chromecast/shell/browser/android/external_video_surface_container_impl.h
diff --git a/chromecast/shell/browser/android/external_video_surface_container_impl.h b/chromecast/shell/browser/android/external_video_surface_container_impl.h
index 91908a5c7bece4cc0d92c8ca7aeab4b792a108ee..04edd26804334c8f959cfb4df8f1981f04653e96 100644
--- a/chromecast/shell/browser/android/external_video_surface_container_impl.h
+++ b/chromecast/shell/browser/android/external_video_surface_container_impl.h
@@ -27,11 +27,11 @@ class ExternalVideoSurfaceContainerImpl
   virtual void RequestExternalVideoSurface(
       int player_id,
       const SurfaceCreatedCB& surface_created_cb,
-      const SurfaceDestroyedCB& surface_destroyed_cb) OVERRIDE;
-  virtual void ReleaseExternalVideoSurface(int player_id) OVERRIDE;
-  virtual void OnFrameInfoUpdated() OVERRIDE;
+      const SurfaceDestroyedCB& surface_destroyed_cb) override;
+  virtual void ReleaseExternalVideoSurface(int player_id) override;
+  virtual void OnFrameInfoUpdated() override;
   virtual void OnExternalVideoSurfacePositionChanged(
-      int player_id, const gfx::RectF& rect) OVERRIDE;
+      int player_id, const gfx::RectF& rect) override;
 
   // Methods called from Java.
   void SurfaceCreated(