MediaRecorder: support |timecode| and remove |m_ignoreMutedMedia|.

third_party/WebKit/Source/modules/mediarecorder/BlobEvent.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 BlobEvent_h
 #define BlobEvent_h
 
+#include "core/dom/DOMHighResTimeStamp.h"
 #include "core/fileapi/Blob.h"
 #include "modules/EventModules.h"
 #include "modules/ModulesExport.h"
 #include "wtf/text/AtomicString.h"
 
 namespace blink {
 
 class Blob;
 class BlobEventInit;
 
 class MODULES_EXPORT BlobEvent final : public Event {
   DEFINE_WRAPPERTYPEINFO();
 
  public:
   ~BlobEvent() override {}
 
   static BlobEvent* create(const AtomicString& type,
                            const BlobEventInit& initializer);
-  static BlobEvent* create(const AtomicString& type, Blob*);
+  static BlobEvent* create(const AtomicString& type, Blob*, double);
 
   Blob* data() const { return m_blob.get(); }
+  DOMHighResTimeStamp timecode() const { return m_timecode; }
 
   // Event
   const AtomicString& interfaceName() const final;
 
   DECLARE_VIRTUAL_TRACE();
 
  private:
   BlobEvent(const AtomicString& type, const BlobEventInit& initializer);
-  BlobEvent(const AtomicString& type, Blob*);
+  BlobEvent(const AtomicString& type, Blob*, double);
 
   Member<Blob> m_blob;
+  DOMHighResTimeStamp m_timecode;
 };
 
 }  // namespace blink
 
 #endif  // BlobEvent_h