[POC-WIP] Link window focus tokens with ExecutionContext.

Source/web/ServiceWorkerGlobalScopeProxy.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 106 matching lines @@
     ASSERT(m_workerGlobalScope);
 
     OwnPtrWillBeRawPtr<MessagePortArray> ports = MessagePort::toMessagePortArray(m_workerGlobalScope, webChannels);
     WebSerializedScriptValue value = WebSerializedScriptValue::fromString(message);
     m_workerGlobalScope->dispatchEvent(MessageEvent::create(ports.release(), value));
 }
 
 void ServiceWorkerGlobalScopeProxy::dispatchNotificationClickEvent(int eventID, const WebString& notificationID, const WebNotificationData& data)
 {
     ASSERT(m_workerGlobalScope);
+    m_workerGlobalScope->giveWindowFocusToken();
     WaitUntilObserver* observer = WaitUntilObserver::create(m_workerGlobalScope, WaitUntilObserver::NotificationClick, eventID);
     // FIXME: Initialize a Notification object based on |notificationID| and |data|.
     NotificationEventInit eventInit;
     RefPtrWillBeRawPtr<Event> event(NotificationEvent::create(EventTypeNames::notificationclick, eventInit, observer));
     m_workerGlobalScope->dispatchExtendableEvent(event.release(), observer);
 }
 
 void ServiceWorkerGlobalScopeProxy::dispatchPushEvent(int eventID, const WebString& data)
 {
     ASSERT(m_workerGlobalScope);
@@ skipping 55 matching lines @@
 
 ServiceWorkerGlobalScopeProxy::ServiceWorkerGlobalScopeProxy(WebEmbeddedWorkerImpl& embeddedWorker, Document& document, WebServiceWorkerContextClient& client)
     : m_embeddedWorker(embeddedWorker)
     , m_document(document)
     , m_client(client)
     , m_workerGlobalScope(0)
 {
 }
 
 } // namespace blink