Add media Remoter mojo interface and RendererWMPDelegate accessor.

content/renderer/media/renderer_webmediaplayer_delegate.h

Index: content/renderer/media/renderer_webmediaplayer_delegate.h
diff --git a/content/renderer/media/renderer_webmediaplayer_delegate.h b/content/renderer/media/renderer_webmediaplayer_delegate.h
index 0e8307744c102447ed18a5835cd8337ad85e5a22..1ae5f9a990706ca1cc3c7da5f343adcb96429299 100644
--- a/content/renderer/media/renderer_webmediaplayer_delegate.h
+++ b/content/renderer/media/renderer_webmediaplayer_delegate.h
@@ -48,6 +48,7 @@ class CONTENT_EXPORT RendererWebMediaPlayerDelegate
   void DidPause(int delegate_id, bool reached_end_of_stream) override;
   void PlayerGone(int delegate_id) override;
   bool IsHidden() override;
+  mojom::Remoter* GetRemoter() override;
 
   // content::RenderFrameObserver overrides.
   void WasHidden() override;
@@ -101,6 +102,9 @@ class CONTENT_EXPORT RendererWebMediaPlayerDelegate
   std::unique_ptr<base::DefaultTickClock> default_tick_clock_;
   base::TickClock* tick_clock_;
 
+  // Lazy-bound pointer to the Remoter service in the browser process.
+  mojom::RemoterPtr remoter_;
+
   DISALLOW_COPY_AND_ASSIGN(RendererWebMediaPlayerDelegate);
 };