Add render-side manager for MediaSession

content/renderer/media/android/webmediasession_android.cc

Index: content/renderer/media/android/webmediasession_android.cc
diff --git a/content/renderer/media/android/webmediasession_android.cc b/content/renderer/media/android/webmediasession_android.cc
index 7977493cd4142143cb93b5af345abc36ca291541..b68e2bbfbc2df26b70f01bfcd4ebe066be36e910 100644
--- a/content/renderer/media/android/webmediasession_android.cc
+++ b/content/renderer/media/android/webmediasession_android.cc
@@ -2,12 +2,25 @@
 // 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/webmediasession_android.h"
+
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
-#include "content/renderer/media/android/webmediasession_android.h"
+#include "content/renderer/media/android/renderer_media_session_manager.h"
 
 namespace content {
 
+WebMediaSessionAndroid::WebMediaSessionAndroid(
+    RendererMediaSessionManager* session_manager)
+    : session_manager_(session_manager) {
+  DCHECK(session_manager_);
+  session_id_ = session_manager_->RegisterMediaSession(this);
+}
+
+WebMediaSessionAndroid::~WebMediaSessionAndroid() {
+  session_manager_->UnregisterMediaSession(session_id_);
+}
+
 void WebMediaSessionAndroid::activate(
     blink::WebMediaSessionActivateCallback* raw_callback) {
   NOTIMPLEMENTED();