NOT FOR LANDING Implement WebMediaSession

content/browser/media/android/browser_media_session_manager.cc

+// Copyright 2015 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/browser_media_session_manager.h"
+
+#include "content/browser/media/android/media_session.h"
+#include "content/public/browser/web_contents.h"
+
+namespace content {
+
+BrowserMediaSessionManager::BrowserMediaSessionManager(
+    RenderFrameHost* render_frame_host)
+    : render_frame_host_(render_frame_host) {
+}
+
+void BrowserMediaSessionManager::OnActivate(int session_id) {
+  WebContents* web_contents = WebContents::FromRenderFrameHost(
+      render_frame_host_);
+  MediaSession* media_session = MediaSession::Get(web_contents);
+  media_session->Activate();
+}
+
+void BrowserMediaSessionManager::OnDeactivate(int session_id) {
+  WebContents* web_contents = WebContents::FromRenderFrameHost(
+      render_frame_host_);
+  MediaSession* media_session = MediaSession::Get(web_contents);
+  media_session->Deactivate();
+}
+
+}  // namespace content