Revert of Enable the volume slider in Ash for windows.

chrome/browser/notifications/desktop_notifications_unittest.cc

Index: chrome/browser/notifications/desktop_notifications_unittest.cc
diff --git a/chrome/browser/notifications/desktop_notifications_unittest.cc b/chrome/browser/notifications/desktop_notifications_unittest.cc
index 5765fcf67a3748c00efd4ca616ef12a4d9a92052..742cdcc5511f0a7959903f1a6b8b8336ab00169e 100644
--- a/chrome/browser/notifications/desktop_notifications_unittest.cc
+++ b/chrome/browser/notifications/desktop_notifications_unittest.cc
@@ -107,11 +107,6 @@
 
 void DesktopNotificationsTest::SetUp() {
   ui::InitializeInputMethodForTesting();
-#if defined(OS_WIN) && defined(USE_ASH)
-  // The system tray under Windows ash contains a volume slider which needs
-  // to talk to the audio hardware using COM.
-  com_initializer_.reset(new base::win::ScopedCOMInitializer());
-#endif
 #if defined(USE_AURA)
   wm_state_.reset(new views::corewm::WMState);
 #endif
@@ -151,9 +146,6 @@
 #endif
 #if defined(USE_AURA)
   wm_state_.reset();
-#endif
-#if defined(OS_WIN) && defined(USE_ASH)
-  com_initializer_.reset();
 #endif
   ui::ShutdownInputMethodForTesting();
 }