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

third_party/WebKit/Source/modules/mediarecorder/BlobEvent.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 "modules/mediarecorder/BlobEvent.h"
 
 #include "modules/mediarecorder/BlobEventInit.h"
+#include "wtf/dtoa/double.h"
 
 namespace blink {
 
 // static
 BlobEvent* BlobEvent::create(const AtomicString& type,
                              const BlobEventInit& initializer) {
   return new BlobEvent(type, initializer);
 }
 
 // static
-BlobEvent* BlobEvent::create(const AtomicString& type, Blob* blob) {
-  return new BlobEvent(type, blob);
+BlobEvent* BlobEvent::create(const AtomicString& type,
+                             Blob* blob,
+                             double timecode) {
+  return new BlobEvent(type, blob, timecode);
 }
 
 const AtomicString& BlobEvent::interfaceName() const {
   return EventNames::BlobEvent;
 }
 
 DEFINE_TRACE(BlobEvent) {
   visitor->trace(m_blob);
   Event::trace(visitor);
 }
 
 BlobEvent::BlobEvent(const AtomicString& type, const BlobEventInit& initializer)
-    : Event(type, initializer), m_blob(initializer.data()) {}
+    : Event(type, initializer),
+      m_blob(initializer.data()),
+      m_timecode(initializer.hasTimecode()
+                     ? initializer.timecode()
+                     : WTF::double_conversion::Double::NaN()) {}
 
-BlobEvent::BlobEvent(const AtomicString& type, Blob* blob)
+BlobEvent::BlobEvent(const AtomicString& type, Blob* blob, double timecode)
     : Event(type, false /* canBubble */, false /* cancelable */),
-      m_blob(blob) {}
+      m_blob(blob),
+      m_timecode(timecode) {}
 
 }  // namespace blink