Revert of Pass task runners to AudioManager constructor.

content/browser/renderer_host/media/media_stream_manager.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 "content/browser/renderer_host/media/media_stream_manager.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <string.h>
 #include <cctype>
@@ skipping 1110 matching lines @@
 
   // Actual audio parameters are required only for MEDIA_TAB_AUDIO_CAPTURE.
   // TODO(guidou): MEDIA_TAB_AUDIO_CAPTURE should not be a special case. See
   // crbug.com/584287.
   if (request->audio_type() == MEDIA_TAB_AUDIO_CAPTURE) {
     // Read output parameters on the correct thread for native audio OS calls.
     // Using base::Unretained is safe since |audio_manager_| is deleted after
     // its task runner, and MediaStreamManager is deleted on the UI thread,
     // after the IO thread has been stopped.
     base::PostTaskAndReplyWithResult(
-        audio_manager_->GetTaskRunner(), FROM_HERE,
+        audio_manager_->GetTaskRunner().get(), FROM_HERE,
         base::Bind(&media::AudioManager::GetDefaultOutputStreamParameters,
                    base::Unretained(audio_manager_)),
         base::Bind(&MediaStreamManager::PostRequestToUI, base::Unretained(this),
                    label, request));
   } else {
     PostRequestToUI(label, request, media::AudioParameters());
   }
 }
 
 void MediaStreamManager::PostRequestToUI(
@@ skipping 970 matching lines @@
     const std::string& device_guid,
     const std::string& raw_unique_id) {
   DCHECK(security_origin.is_valid());
   DCHECK(!raw_unique_id.empty());
   std::string guid_from_raw_device_id =
       GetHMACForMediaDeviceID(sc, security_origin, raw_unique_id);
   return guid_from_raw_device_id == device_guid;
 }
 
 }  // namespace content