Support CAST+WMPI on android

content/renderer/media/android/webmediaplayer_android.h

Index: content/renderer/media/android/webmediaplayer_android.h
diff --git a/content/renderer/media/android/webmediaplayer_android.h b/content/renderer/media/android/webmediaplayer_android.h
index 51ba4af1b3cc3fbf820774b6f55e37bba5502a87..e5c637a69de7e9c22a07736c37f14827ba7132af 100644
--- a/content/renderer/media/android/webmediaplayer_android.h
+++ b/content/renderer/media/android/webmediaplayer_android.h
@@ -22,6 +22,7 @@
 #include "content/public/renderer/render_frame_observer.h"
 #include "content/renderer/media/android/media_info_loader.h"
 #include "content/renderer/media/android/media_source_delegate.h"
+#include "content/renderer/media/android/renderer_media_player_manager.h"
 #include "content/renderer/media/android/stream_texture_factory.h"
 #include "gpu/command_buffer/common/mailbox.h"
 #include "media/base/android/media_player_android.h"
@@ -81,7 +82,8 @@ class RendererMediaPlayerManager;
 class WebMediaPlayerAndroid : public blink::WebMediaPlayer,
                               public cc::VideoFrameProvider,
                               public RenderFrameObserver,
-                              public StreamTextureFactoryContextObserver {
+                              public StreamTextureFactoryContextObserver,
+                              public content::RendererMediaPlayerInterface {
  public:
   // Construct a WebMediaPlayerAndroid object. This class communicates with the
   // MediaPlayerAndroid object in the browser process through |proxy|.