Fix crash caused by DCHECK global pointer for --single-process model

content/renderer/media/audio_input_message_filter.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/renderer/media/audio_input_message_filter.h"
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "base/strings/stringprintf.h"
 #include "content/common/media/audio_messages.h"
@@ skipping 38 matching lines @@
   const int render_view_id_;
   int stream_id_;
 };
 
 AudioInputMessageFilter* AudioInputMessageFilter::g_filter = NULL;
 
 AudioInputMessageFilter::AudioInputMessageFilter(
     const scoped_refptr<base::MessageLoopProxy>& io_message_loop)
     : sender_(NULL),
       io_message_loop_(io_message_loop) {
-  DCHECK(!g_filter);
   g_filter = this;
 }
 
 AudioInputMessageFilter::~AudioInputMessageFilter() {
   DCHECK_EQ(g_filter, this);
   g_filter = NULL;
 }
 
 // static
 AudioInputMessageFilter* AudioInputMessageFilter::Get() {
@@ skipping 150 matching lines @@
 void AudioInputMessageFilter::AudioInputIPCImpl::CloseStream() {
   DCHECK(filter_->io_message_loop_->BelongsToCurrentThread());
   DCHECK_NE(stream_id_, kStreamIDNotSet);
   LogMessage(stream_id_, "CloseStream");
   filter_->Send(new AudioInputHostMsg_CloseStream(stream_id_));
   filter_->delegates_.Remove(stream_id_);
   stream_id_ = kStreamIDNotSet;
 }
 
 }  // namespace content