AudioWorklet prototype

third_party/WebKit/Source/modules/webaudio/AudioWorklet.cpp

 // Copyright 2016 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 "modules/webaudio/AudioWorklet.h"
 
 #include "bindings/core/v8/V8BindingForCore.h"
 #include "core/dom/Document.h"
 #include "core/frame/LocalFrame.h"
 #include "core/workers/WorkerClients.h"
 #include "modules/webaudio/AudioWorkletMessagingProxy.h"
 #include "modules/webaudio/AudioWorkletThread.h"
 
 namespace blink {
 
 AudioWorklet* AudioWorklet::Create(LocalFrame* frame) {
   return new AudioWorklet(frame);
 }
 
 AudioWorklet::AudioWorklet(LocalFrame* frame) : Worklet(frame) {}
 
 AudioWorklet::~AudioWorklet() {}
 
+AudioWorkletMessagingProxy* AudioWorklet::GetWorkletMessagingProxy() const {
+  return static_cast<AudioWorkletMessagingProxy*>(
+      FindAvailableGlobalScope());
+}
+
 bool AudioWorklet::NeedsToCreateGlobalScope() {
   // For now, create only one global scope per document.
   // TODO(nhiroki): Revisit this later.
   return GetNumberOfGlobalScopes() == 0;
 }
 
 WorkletGlobalScopeProxy* AudioWorklet::CreateGlobalScope() {
   DCHECK(NeedsToCreateGlobalScope());
   AudioWorkletThread::EnsureSharedBackingThread();
 
   WorkerClients* worker_clients = WorkerClients::Create();
   AudioWorkletMessagingProxy* proxy =
       new AudioWorkletMessagingProxy(GetExecutionContext(), worker_clients);
   proxy->Initialize();
   return proxy;
 }
 
 DEFINE_TRACE(AudioWorklet) {
   Worklet::Trace(visitor);
 }
 
 }  // namespace blink