Adds CHECK to ensure all input streams are closed as expected.

media/audio/audio_manager_base.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_manager_base.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/macros.h"
@@ skipping 306 matching lines @@
   // processing task queue at this point. So even if tasks to close the
   // streams are enqueued, they would not run leading to CHECKs getting hit
   // in the destructor about open streams. Close them explicitly here.
   // crbug.com/608049.
   for (auto iter = input_streams_.begin(); iter != input_streams_.end();) {
     // Note: Closing the stream will invalidate the iterator.
     // Increment the iterator before closing the stream.
     AudioInputStream* stream = *iter++;
     stream->Close();
   }
+  CHECK(input_streams_.empty());
 #endif  // OS_MACOSX
 }
 
 void AudioManagerBase::AddOutputDeviceChangeListener(
     AudioDeviceListener* listener) {
   DCHECK(GetTaskRunner()->BelongsToCurrentThread());
   output_listeners_.AddObserver(listener);
 }
 
 void AudioManagerBase::RemoveOutputDeviceChangeListener(
@@ skipping 67 matching lines @@
 
   return 0;
 }
 
 std::unique_ptr<AudioLog> AudioManagerBase::CreateAudioLog(
     AudioLogFactory::AudioComponent component) {
   return audio_log_factory_->CreateAudioLog(component);
 }
 
 }  // namespace media