Hook up RendererMediaSessionManager with browser side

third_party/WebKit/Source/modules/mediasession/MediaSession.cpp

 // 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 "config.h"
 #include "modules/mediasession/MediaSession.h"
 
 #include "bindings/core/v8/CallbackPromiseAdapter.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "bindings/core/v8/ScriptState.h"
 #include "core/dom/DOMException.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/frame/LocalDOMWindow.h"
 #include "core/frame/LocalFrame.h"
 #include "core/loader/FrameLoaderClient.h"
 #include "modules/mediasession/MediaSessionError.h"
 
 namespace blink {
 
-MediaSession::MediaSession(PassOwnPtr<WebMediaSession> webMediaSession)
-    : m_webMediaSession(webMediaSession)
+MediaSession::MediaSession(ExecutionContext* context, PassOwnPtr<WebMediaSession> webMediaSession)
+    : ActiveDOMObject(context)
+    , m_webMediaSession(webMediaSession)
 {
     ASSERT(m_webMediaSession);
 }
 
 MediaSession* MediaSession::create(ExecutionContext* context, ExceptionState& exceptionState)
 {
     Document* document = toDocument(context);
     LocalFrame* frame = document->frame();
     FrameLoaderClient* client = frame->loader().client();
     OwnPtr<WebMediaSession> webMediaSession = client->createWebMediaSession();
     if (!webMediaSession) {
         exceptionState.throwDOMException(NotSupportedError, "Missing platform implementation.");
         return nullptr;
     }
-    return new MediaSession(webMediaSession.release());
+    return new MediaSession(context, webMediaSession.release());
 }
 
 ScriptPromise MediaSession::activate(ScriptState* scriptState)
 {
     ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
     ScriptPromise promise = resolver->promise();
 
     m_webMediaSession->activate(new CallbackPromiseAdapter<void, MediaSessionError>(resolver));
     return promise;
 }
 
 ScriptPromise MediaSession::deactivate(ScriptState* scriptState)
 {
     ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
     ScriptPromise promise = resolver->promise();
 
     m_webMediaSession->deactivate(new CallbackPromiseAdapter<void, void>(resolver));
     return promise;
 }
 
+bool MediaSession::hasPendingActivity() const
+{
+    return m_webMediaSession->hasPendingCallbacks();
+}
+
 } // namespace blink