Media Remoting: Switch to remoting only when media is playing.

media/remoting/remoting_renderer_controller.h

Index: media/remoting/remoting_renderer_controller.h
diff --git a/media/remoting/remoting_renderer_controller.h b/media/remoting/remoting_renderer_controller.h
index 6d31513267852361543430c9db7f4381dba1b9bd..c3a35bdc41ea36a3116033f955a4b07cb5254c2f 100644
--- a/media/remoting/remoting_renderer_controller.h
+++ b/media/remoting/remoting_renderer_controller.h
@@ -39,6 +39,8 @@ class RemotingRendererController final : public RemotingSourceImpl::Client,
   void OnSetCdm(CdmContext* cdm_context) override;
   void OnMetadataChanged(const PipelineMetadata& metadata) override;
   void OnRemotePlaybackDisabled(bool disabled) override;
+  void OnPlaying() override;
+  void OnPaused() override;
 
   void SetSwitchRendererCallback(const base::Closure& cb);
   void SetRemoteSinkAvailableChangedCallback(
@@ -120,6 +122,9 @@ class RemotingRendererController final : public RemotingSourceImpl::Client,
   // Indicates whether video is the dominant visible content in the tab.
   bool is_dominant_content_ = false;
 
+  // Indicates whether video is paused.
+  bool is_paused_ = true;
+
   // The callback to switch the media renderer.
   base::Closure switch_renderer_cb_;