Make MediaSession available on Desktop

content/browser/media/session/media_session_service_impl.cc

Index: content/browser/media/session/media_session_service_impl.cc
diff --git a/content/browser/media/android/media_session_service_impl.cc b/content/browser/media/session/media_session_service_impl.cc
similarity index 82%
rename from content/browser/media/android/media_session_service_impl.cc
rename to content/browser/media/session/media_session_service_impl.cc
index 51e2799590d2dfa78491e04fa626e784df1ab7ba..1eeaaf8dca4da6e8e882738e4f0262b105f822aa 100644
--- a/content/browser/media/android/media_session_service_impl.cc
+++ b/content/browser/media/session/media_session_service_impl.cc
@@ -2,11 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "content/browser/media/android/media_session_service_impl.h"
+#include "content/browser/media/session/media_session_service_impl.h"
 
-#include "base/strings/utf_string_conversions.h"
-#include "content/browser/media/android/browser_media_session_manager.h"
-#include "content/browser/media/android/media_web_contents_observer_android.h"
+#include "content/browser/media/media_web_contents_observer.h"
+#include "content/browser/media/session/browser_media_session_manager.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/web_contents.h"
@@ -34,7 +33,7 @@ void MediaSessionServiceImpl::SetMetadata(
   WebContentsImpl* contents = static_cast<WebContentsImpl*>(
       WebContents::FromRenderFrameHost(render_frame_host_));
   DCHECK(contents);
-  MediaWebContentsObserverAndroid::FromWebContents(contents)
+  contents->media_web_contents_observer()
       ->GetMediaSessionManager(render_frame_host_)
       ->OnSetMetadata(0, metadata);
 }