[Android] A prototype of the interactive media notification.

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 390121b060993439fdd21f708c8010964ed605dd..05615d7f9e249285e4c0b39ea2d4ce2fce935a50 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -116,6 +116,7 @@
 #include "content/browser/android/date_time_chooser_android.h"
 #include "content/browser/android/media_players_observer.h"
 #include "content/browser/media/android/browser_media_player_manager.h"
+#include "content/browser/media/android/media_session.h"
 #include "content/browser/web_contents/web_contents_android.h"
 #endif
 
@@ -4231,6 +4232,10 @@ bool WebContentsImpl::CreateRenderViewForInitialEmptyDocument() {
       frame_tree_.root()->current_replication_state(), true);
 }
 
+MediaControlsDelegate* WebContentsImpl::GetMediaControlsDelegate() {
+  return MediaSession::Get(this);
+}
+
 #elif defined(OS_MACOSX)
 
 void WebContentsImpl::SetAllowOtherViews(bool allow) {