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

third_party/WebKit/public/platform/WebMediaRecorderHandlerClient.h

Index: third_party/WebKit/public/platform/WebMediaRecorderHandlerClient.h
diff --git a/third_party/WebKit/public/platform/WebMediaRecorderHandlerClient.h b/third_party/WebKit/public/platform/WebMediaRecorderHandlerClient.h
index 679312f203f58f4003ac919ef2968006198434f1..029f24ef8a7d9a66caa26aff0c9b051a9e9c8df8 100644
--- a/third_party/WebKit/public/platform/WebMediaRecorderHandlerClient.h
+++ b/third_party/WebKit/public/platform/WebMediaRecorderHandlerClient.h
@@ -14,7 +14,10 @@ class WebString;
 // Interface used by a MediaRecorder to get errors and recorded data delivered.
 class WebMediaRecorderHandlerClient {
  public:
-  virtual void writeData(const char* data, size_t length, bool lastInslice) = 0;
+  virtual void writeData(const char* data,
+                         size_t length,
+                         bool lastInslice,
+                         double timecode) = 0;
 
   virtual void onError(const WebString& message) = 0;
 };