Add media Remoter mojo interface and RendererWMPDelegate accessor.

content/renderer/media/renderer_webmediaplayer_delegate.cc

Index: content/renderer/media/renderer_webmediaplayer_delegate.cc
diff --git a/content/renderer/media/renderer_webmediaplayer_delegate.cc b/content/renderer/media/renderer_webmediaplayer_delegate.cc
index f3b8125aa2921d42bd72ea893155e95d3b45e312..c700e4f5521955582b667273086c2bf232f38d37 100644
--- a/content/renderer/media/renderer_webmediaplayer_delegate.cc
+++ b/content/renderer/media/renderer_webmediaplayer_delegate.cc
@@ -9,6 +9,7 @@
 #include "base/auto_reset.h"
 #include "content/common/media/media_player_delegate_messages.h"
 #include "content/public/renderer/render_frame.h"
+#include "services/shell/public/cpp/interface_provider.h"
 #include "third_party/WebKit/public/platform/WebMediaPlayer.h"
 
 namespace media {
@@ -65,6 +66,12 @@ bool RendererWebMediaPlayerDelegate::IsHidden() {
   return render_frame()->IsHidden();
 }
 
+mojom::Remoter* RendererWebMediaPlayerDelegate::GetRemoter() {
+  if (!remoter_)
+    render_frame()->GetRemoteInterfaces()->GetInterface(GetProxy(&remoter_));

[Ken Rockot(use gerrit already), 2016/07/27 22:31:15]

nit: for convenience you can also just GetInterface(&remoter_)

[miu, 2016/09/02 22:13:29]

Acknowledged. (Not making changes to WMPIDelegate in current code.)

+  return remoter_.get();
+}
+
 void RendererWebMediaPlayerDelegate::WasHidden() {
   for (IDMap<Observer>::iterator it(&id_map_); !it.IsAtEnd(); it.Advance())
     it.GetCurrentValue()->OnHidden();