Make MediaSession available on Desktop

content/browser/media/session/media_session_service_impl.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // 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"
 #include "content/public/common/media_metadata.h"
 
 namespace content {
 
 MediaSessionServiceImpl::MediaSessionServiceImpl(
     RenderFrameHost* render_frame_host)
     : render_frame_host_(render_frame_host) {}
 
 MediaSessionServiceImpl::~MediaSessionServiceImpl() = default;
 
 // static
 void MediaSessionServiceImpl::Create(
     RenderFrameHost* render_frame_host,
     blink::mojom::MediaSessionServiceRequest request) {
   MediaSessionServiceImpl* impl =
       new MediaSessionServiceImpl(render_frame_host);
   impl->Bind(std::move(request));
 }
 
 void MediaSessionServiceImpl::SetMetadata(
     const base::Optional<content::MediaMetadata>& metadata) {
   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);
 }
 
 void MediaSessionServiceImpl::Bind(
     blink::mojom::MediaSessionServiceRequest request) {
   binding_.reset(new mojo::Binding<blink::mojom::MediaSessionService>(
       this, std::move(request)));
 }
 
 }  // namespace content