AudioMirroringManager becomes a global LazyInstance.

content/browser/renderer_host/render_process_host_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.
 
 // Represents the browser side of the browser <--> renderer communication
 // channel. There will be one RenderProcessHost per renderer process.
 
 #include "content/browser/renderer_host/render_process_host_impl.h"
 
 #include <algorithm>
@@ skipping 737 matching lines @@
       storage_partition_impl_->GetFileSystemContext(),
       storage_partition_impl_->GetServiceWorkerContext(),
       get_contexts_callback);
 
   AddFilter(resource_message_filter);
   MediaStreamManager* media_stream_manager =
       BrowserMainLoop::GetInstance()->media_stream_manager();
   AddFilter(new AudioInputRendererHost(
       audio_manager,
       media_stream_manager,
-      BrowserMainLoop::GetInstance()->audio_mirroring_manager(),
+      AudioMirroringManager::GetInstance(),
       BrowserMainLoop::GetInstance()->user_input_monitor()));
   // The AudioRendererHost needs to be available for lookup, so it's
   // stashed in a member variable.
   audio_renderer_host_ = new AudioRendererHost(
       GetID(),
       audio_manager,
-      BrowserMainLoop::GetInstance()->audio_mirroring_manager(),
+      AudioMirroringManager::GetInstance(),
       media_internals,
       media_stream_manager);
   AddFilter(audio_renderer_host_.get());
   AddFilter(
       new MidiHost(GetID(), BrowserMainLoop::GetInstance()->midi_manager()));
   AddFilter(new VideoCaptureHost(media_stream_manager));
   AddFilter(new AppCacheDispatcherHost(
       storage_partition_impl_->GetAppCacheService(),
       GetID()));
   AddFilter(new ClipboardMessageFilter);
@@ skipping 1577 matching lines @@
 }
 
 void RenderProcessHostImpl::OnDeletedGpuMemoryBuffer(
     gfx::GpuMemoryBufferType type,
     const gfx::GpuMemoryBufferId& id) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   GpuMemoryBufferImpl::DeletedByChildProcess(type, id, GetHandle());
 }
 
 }  // namespace content