NOT FOR LANDING Implement WebMediaSession

content/renderer/media/android/renderer_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/renderer/media/android/renderer_media_session_manager.h"
+
+#include "content/common/media/media_session_messages_android.h"
+
+namespace content {
+
+RendererMediaSessionManager::RendererMediaSessionManager(
+    RenderFrame* render_frame)
+    : RenderFrameObserver(render_frame)
+    , next_media_session_id_(0) {
+}
+
+RendererMediaSessionManager::~RendererMediaSessionManager() {
+}
+
+void RendererMediaSessionManager::Activate(int session_id) {
+  Send(new MediaSessionHostMsg_Activate(routing_id(), session_id));
+}
+
+void RendererMediaSessionManager::Deactivate(int session_id) {
+  Send(new MediaSessionHostMsg_Deactivate(routing_id(), session_id));
+}
+
+}  // namespace content