Have AUAudioInputStream::Stop() also cancel any deferred start.

media/audio/mac/audio_low_latency_input_mac.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/mac/audio_low_latency_input_mac.h"
 
 #include <CoreServices/CoreServices.h>
 #include <mach/mach.h>
 #include <string>
 
 #include "base/bind.h"
@@ skipping 559 matching lines @@
   // monitor if the input stream is alive or not.
   check_alive_timer_.reset(new base::RepeatingTimer());
   check_alive_timer_->Start(
       FROM_HERE, base::TimeDelta::FromSeconds(kCheckInputIsAliveTimeInSeconds),
       this, &AUAudioInputStream::CheckIfInputStreamIsAlive);
   DCHECK(check_alive_timer_->IsRunning());
 }
 
 void AUAudioInputStream::Stop() {
   DCHECK(thread_checker_.CalledOnValidThread());
+  deferred_start_cb_.Cancel();
   DVLOG(1) << "Stop";
   StopAgc();
   if (check_alive_timer_ != nullptr) {
     check_alive_timer_->Stop();
     check_alive_timer_.reset();
   }
   if (input_callback_timer_ != nullptr) {
     input_callback_timer_->Stop();
     input_callback_timer_.reset();
   }
@@ skipping 1077 matching lines @@
 
   number_of_frames_provided_ = 0;
   glitches_detected_ = 0;
   last_sample_time_ = 0;
   last_number_of_frames_ = 0;
   total_lost_frames_ = 0;
   largest_glitch_frames_ = 0;
 }
 
 }  // namespace media