Implement new audio handler which talks to the new audio dbus apis.

chrome/browser/chromeos/chrome_browser_main_chromeos.cc

Index: chrome/browser/chromeos/chrome_browser_main_chromeos.cc
diff --git a/chrome/browser/chromeos/chrome_browser_main_chromeos.cc b/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
index d628d9093a639d5f59f635221eba5b9de65ce316..a767e298c7a8c047b484bd6bf4a0888e798515d7 100644
--- a/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
+++ b/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
@@ -87,6 +87,7 @@
 #include "chrome/common/chrome_version_info.h"
 #include "chrome/common/logging_chrome.h"
 #include "chrome/common/pref_names.h"
+#include "chromeos/audio/audio_pref_handler.h"
 #include "chromeos/chromeos_switches.h"
 #include "chromeos/cryptohome/async_method_caller.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
@@ -454,7 +455,8 @@ void ChromeBrowserMainPartsChromeos::PostMainMessageLoopStart() {
 // Threads are initialized between MainMessageLoopStart and MainMessageLoopRun.
 // about_flags settings are applied in ChromeBrowserMainParts::PreCreateThreads.
 void ChromeBrowserMainPartsChromeos::PreMainMessageLoopRun() {
-  AudioHandler::Initialize();
+  AudioHandler::Initialize(
+      AudioPrefHandler::Create(g_browser_process->local_state()));
 
   base::FilePath downloads_directory;
   CHECK(PathService::Get(chrome::DIR_DEFAULT_DOWNLOADS, &downloads_directory));