Expose Timer::AbandonAndStop, so it can safely be destroyed on another thread.

media/audio/audio_input_controller.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/audio/audio_input_controller.h"
 
 #include <inttypes.h>
 
 #include <algorithm>
 #include <limits>
@@ skipping 379 matching lines @@
   stream_->Start(audio_callback_.get());
 }
 
 void AudioInputController::DoClose() {
   DCHECK(task_runner_->BelongsToCurrentThread());
   SCOPED_UMA_HISTOGRAM_TIMER("Media.AudioInputController.CloseTime");
 
   if (!stream_)
     return;
 
-  check_muted_state_timer_.Stop();
+  check_muted_state_timer_.AbandonAndStop();
 
   std::string log_string;
   static const char kLogStringPrefix[] = "AIC::DoClose:";
 
   // Allow calling unconditionally and bail if we don't have a stream to close.
   if (audio_callback_) {
     stream_->Stop();
 
     // Sometimes a stream (and accompanying audio track) is created and
     // immediately closed or discarded. In this case they are registered as
@@ skipping 287 matching lines @@
     case AudioParameters::Format::AUDIO_PCM_LOW_LATENCY:
       return AudioInputController::StreamType::LOW_LATENCY;
     default:
       // Currently, the remaining supported type is fake. Reconsider if other
       // formats become supported.
       return AudioInputController::StreamType::FAKE;
   }
 }
 
 }  // namespace media