Remove the AudioManager singleton.

chrome/test/base/testing_browser_process.cc

 // Copyright (c) 2011 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 "chrome/test/base/testing_browser_process.h"
 
 #include "base/string_util.h"
 #include "chrome/browser/google/google_url_tracker.h"
 #include "chrome/browser/notifications/notification_ui_manager.h"
 #include "chrome/browser/policy/browser_policy_connector.h"
@@ skipping 222 matching lines @@
 }
 
 ComponentUpdateService* TestingBrowserProcess::component_updater() {
   return NULL;
 }
 
 CRLSetFetcher* TestingBrowserProcess::crl_set_fetcher() {
   return NULL;
 }
 
+AudioManager* TestingBrowserProcess::audio_manager() {
+  return NULL;
+}
+
 void TestingBrowserProcess::SetLocalState(PrefService* local_state) {
   if (!local_state && notification_ui_manager_.get())
     notification_ui_manager_.reset();  // Used local_state_.
   local_state_ = local_state;
 }
 
 void TestingBrowserProcess::SetGoogleURLTracker(
     GoogleURLTracker* google_url_tracker) {
   google_url_tracker_.reset(google_url_tracker);
 }
 
 void TestingBrowserProcess::SetIOThread(IOThread* io_thread) {
   io_thread_ = io_thread;
 }
 
 void TestingBrowserProcess::SetBrowserPolicyConnector(
     policy::BrowserPolicyConnector* connector) {
   browser_policy_connector_.reset(connector);
 }