Fix various uninitialized member variables in media code.

media/filters/audio_renderer_impl.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/filters/audio_renderer_impl.h"
 
 #include <math.h>
 
 #include <algorithm>
 
@@ skipping 29 matching lines @@
 
 }  // namespace
 
 AudioRendererImpl::AudioRendererImpl(
     const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
     media::AudioRendererSink* sink,
     ScopedVector<AudioDecoder> decoders,
     const SetDecryptorReadyCB& set_decryptor_ready_cb,
     AudioHardwareConfig* hardware_config)
     : task_runner_(task_runner),
+      expecting_config_changes_(false),
       sink_(sink),
       audio_buffer_stream_(new AudioBufferStream(task_runner,
                                                  decoders.Pass(),
                                                  set_decryptor_ready_cb)),
       hardware_config_(hardware_config),
       state_(kUninitialized),
       buffering_state_(BUFFERING_HAVE_NOTHING),
       rendering_(false),
       sink_playing_(false),
       pending_read_(false),
@@ skipping 665 matching lines @@
            << buffering_state;
   DCHECK_NE(buffering_state_, buffering_state);
   lock_.AssertAcquired();
   buffering_state_ = buffering_state;
 
   task_runner_->PostTask(FROM_HERE,
                          base::Bind(buffering_state_cb_, buffering_state_));
 }
 
 }  // namespace media