AudioMirroringManager becomes a global LazyInstance.

content/browser/browser_main_loop.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/browser/browser_main_loop.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/file_util.h"
@@ skipping 17 matching lines @@
 #include "content/browser/device_sensors/device_inertial_sensor_service.h"
 #include "content/browser/download/save_file_manager.h"
 #include "content/browser/gamepad/gamepad_service.h"
 #include "content/browser/gpu/browser_gpu_channel_host_factory.h"
 #include "content/browser/gpu/compositor_util.h"
 #include "content/browser/gpu/gpu_data_manager_impl.h"
 #include "content/browser/gpu/gpu_process_host.h"
 #include "content/browser/gpu/gpu_process_host_ui_shim.h"
 #include "content/browser/histogram_synchronizer.h"
 #include "content/browser/loader/resource_dispatcher_host_impl.h"
-#include "content/browser/media/capture/audio_mirroring_manager.h"
 #include "content/browser/media/media_internals.h"
 #include "content/browser/net/browser_online_state_observer.h"
 #include "content/browser/plugin_service_impl.h"
 #include "content/browser/renderer_host/media/media_stream_manager.h"
 #include "content/browser/speech/speech_recognition_manager_impl.h"
 #include "content/browser/startup_task_runner.h"
 #include "content/browser/time_zone_monitor.h"
 #include "content/browser/webui/content_web_ui_controller_factory.h"
 #include "content/browser/webui/url_data_manager.h"
 #include "content/public/browser/browser_main_parts.h"
@@ skipping 451 matching lines @@
     midi_manager_.reset(media::MidiManager::Create());
   }
   {
     TRACE_EVENT0("startup",
                  "BrowserMainLoop::Subsystem:ContentWebUIController");
     WebUIControllerFactory::RegisterFactory(
         ContentWebUIControllerFactory::GetInstance());
   }
 
   {
-    TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:AudioMirroringManager");
-    audio_mirroring_manager_.reset(new AudioMirroringManager());
-  }
-  {
     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:OnlineStateObserver");
     online_state_observer_.reset(new BrowserOnlineStateObserver);
   }
 
   {
     system_stats_monitor_.reset(new base::debug::TraceEventSystemStatsMonitor(
         base::ThreadTaskRunnerHandle::Get()));
   }
 #endif  // !defined(OS_IOS)
 
@@ skipping 673 matching lines @@
                              &BrowserMainLoop::EndStartupTracing);
 }
 
 void BrowserMainLoop::EndStartupTracing() {
   is_tracing_startup_ = false;
   TracingController::GetInstance()->DisableRecording(
       startup_trace_file_, base::Bind(&OnStoppedStartupTracing));
 }
 
 }  // namespace content