Intiialize AudioManager and related class lazily

content/browser/renderer_host/render_process_host_impl.cc

 // Copyright 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 583 matching lines @@
   // render process. This ensures that when a test is being run in one of the
   // single process modes, the global attachment broker is the privileged
   // attachment broker, rather than an unprivileged attachment broker.
 #if defined(OS_MACOSX)
   IPC::AttachmentBrokerPrivileged::CreateBrokerIfNeeded(
       MachBroker::GetInstance());
 #else
   IPC::AttachmentBrokerPrivileged::CreateBrokerIfNeeded();
 #endif  // defined(OS_MACOSX)
 #endif  // USE_ATTACHMENT_BROKER
+  BrowserMainLoop::GetInstance()->InitializeMediaComponentsIfNeeded();
 }
 
 // static
 void RenderProcessHostImpl::ShutDownInProcessRenderer() {
   DCHECK(g_run_renderer_in_process_);
 
   switch (g_all_hosts.Pointer()->size()) {
     case 0:
       return;
     case 1: {
@@ skipping 2197 matching lines @@
   LOG(ERROR) << "Terminating render process for bad Mojo message: " << error;
 
   // The ReceivedBadMessage call below will trigger a DumpWithoutCrashing. Alias
   // enough information here so that we can determine what the bad message was.
   base::debug::Alias(&error);
   bad_message::ReceivedBadMessage(process.get(),
                                   bad_message::RPH_MOJO_PROCESS_ERROR);
 }
 
 }  // namespace content