Add support for cancellation of demuxer reads.

media/base/media_log.cc

 // Copyright (c) 2012 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 "media/base/media_log.h"
 
 #include <utility>
 
 #include "base/atomic_sequence_num.h"
 #include "base/json/json_writer.h"
@@ skipping 156 matching lines @@
 
 MediaLog::~MediaLog() {}
 
 void MediaLog::AddEvent(std::unique_ptr<MediaLogEvent> event) {}
 
 std::string MediaLog::GetLastErrorMessage() {
   return "";
 }
 
 void MediaLog::RecordRapporWithSecurityOrigin(const std::string& metric) {
-  NOTIMPLEMENTED() << "Default MediaLog doesn't support rappor reporting.";
+  DVLOG(1) << "Default MediaLog doesn't support rappor reporting.";
 }
 
 std::unique_ptr<MediaLogEvent> MediaLog::CreateEvent(MediaLogEvent::Type type) {
   std::unique_ptr<MediaLogEvent> event(new MediaLogEvent);
   event->id = id_;
   event->type = type;
   event->time = base::TimeTicks::Now();
   return event;
 }
 
@@ skipping 116 matching lines @@
                      const scoped_refptr<MediaLog>& media_log)
     : level_(level), media_log_(media_log) {
   DCHECK(media_log_.get());
 }
 
 LogHelper::~LogHelper() {
   media_log_->AddLogEvent(level_, stream_.str());
 }
 
 }  //namespace media