compositor-worker: Allow registering compositor-frame callbacks.

Source/modules/compositorworker/CompositorWorkerGlobalScope.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/compositorworker/CompositorWorkerGlobalScope.h"
 
 #include "bindings/core/v8/SerializedScriptValue.h"
 #include "core/workers/WorkerObjectProxy.h"
 #include "core/workers/WorkerThreadStartupData.h"
 #include "modules/EventTargetModules.h"
 #include "modules/compositorworker/CompositorWorkerThread.h"
 
 namespace blink {
 
 PassRefPtrWillBeRawPtr<CompositorWorkerGlobalScope> CompositorWorkerGlobalScope::create(CompositorWorkerThread* thread, PassOwnPtrWillBeRawPtr<WorkerThreadStartupData> startupData, double timeOrigin)
 {
     RefPtrWillBeRawPtr<CompositorWorkerGlobalScope> context = adoptRefWillBeNoop(new CompositorWorkerGlobalScope(startupData->m_scriptURL, startupData->m_userAgent, thread, timeOrigin, startupData->m_starterOrigin, startupData->m_workerClients.release()));
     context->applyContentSecurityPolicyFromString(startupData->m_contentSecurityPolicy, startupData->m_contentSecurityPolicyType);
     return context.release();
 }
 
 CompositorWorkerGlobalScope::CompositorWorkerGlobalScope(const KURL& url, const String& userAgent, CompositorWorkerThread* thread, double timeOrigin, const SecurityOrigin* starterOrigin, PassOwnPtrWillBeRawPtr<WorkerClients> workerClients)
     : WorkerGlobalScope(url, userAgent, thread, timeOrigin, starterOrigin, workerClients)
+    , m_callbackCollection(this)
 {
 }
 
 CompositorWorkerGlobalScope::~CompositorWorkerGlobalScope()
 {
 }
 
 const AtomicString& CompositorWorkerGlobalScope::interfaceName() const
 {
     return EventTargetNames::CompositorWorkerGlobalScope;
 }
 
 void CompositorWorkerGlobalScope::postMessage(ExecutionContext*, PassRefPtr<SerializedScriptValue> message, const MessagePortArray* ports, ExceptionState& exceptionState)
 {
     // Disentangle the port in preparation for sending it to the remote context.
     OwnPtr<MessagePortChannelArray> channels = MessagePort::disentanglePorts(ports, exceptionState);
     if (exceptionState.hadException())
         return;
     thread()->workerObjectProxy().postMessageToWorkerObject(message, channels.release());
 }
 
+int CompositorWorkerGlobalScope::requestCompositorFrame(RequestAnimationFrameCallback* callback)
+{
+    return m_callbackCollection.registerCallback(callback);
+}
+
+void CompositorWorkerGlobalScope::cancelCompositorFrame(int id)
+{
+    m_callbackCollection.cancelCallback(id);
+}
+
+void CompositorWorkerGlobalScope::executeCompositorFrameCallbacks(double highResTimeNow)
+{
+    m_callbackCollection.executeCallbacks(highResTimeNow, highResTimeNow);
+}
+
 CompositorWorkerThread* CompositorWorkerGlobalScope::thread() const
 {
     return static_cast<CompositorWorkerThread*>(WorkerGlobalScope::thread());
 }
 
 } // namespace blink