Implementation of 'AudioContext.getOutputTimestamp' method

third_party/WebKit/Source/modules/webaudio/AudioContext.h

 // 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.
 
 #ifndef AudioContext_h
 #define AudioContext_h
 
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "modules/webaudio/BaseAudioContext.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
+class AudioTimestamp;
 class Document;
 class ExceptionState;
 class ScriptState;
 
 // This is an BaseAudioContext which actually plays sound, unlike an
 // OfflineAudioContext which renders sound into a buffer.
 class AudioContext : public BaseAudioContext {
   DEFINE_WRAPPERTYPEINFO();
 
  public:
   static AudioContext* create(Document&, ExceptionState&);
 
   ~AudioContext() override;
   DECLARE_VIRTUAL_TRACE();
 
   ScriptPromise closeContext(ScriptState*);
   bool isContextClosed() const final;
 
   ScriptPromise suspendContext(ScriptState*) final;
   ScriptPromise resumeContext(ScriptState*) final;
 
   bool hasRealtimeConstraint() final { return true; }
 
+  void getOutputTimestamp(ScriptState*, AudioTimestamp&);
+
  protected:
   AudioContext(Document&);
 
   void didClose() final;
 
  private:
   void stopRendering();
 
   unsigned m_contextId;
   Member<ScriptPromiseResolver> m_closeResolver;
 };
 
 }  // namespace blink
 
 #endif  // AudioContext_h