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 742cdcc5511f0a7959903f1a6b8b8336ab00169e..9973d1bc80da260edbd825e1e3305c45f6b6b705 100644
--- a/chrome/browser/notifications/desktop_notifications_unittest.cc
+++ b/chrome/browser/notifications/desktop_notifications_unittest.cc
@@ -107,6 +107,9 @@ DesktopNotificationsTest::~DesktopNotificationsTest() {
 
 void DesktopNotificationsTest::SetUp() {
   ui::InitializeInputMethodForTesting();
+#if defined(OS_WIN)

[dewittj, 2014/03/03 22:48:55]

same here

+    com_initializer_.reset(new base::win::ScopedCOMInitializer());

[dewittj, 2014/03/03 22:48:55]

Please add a comment referencing the code that requires this initializer;
Probably the DesktopNotificationService needs a refactoring so its unit tests
don't have all these outside dependencies.

+#endif
 #if defined(USE_AURA)
   wm_state_.reset(new views::corewm::WMState);
 #endif
@@ -147,6 +150,9 @@ void DesktopNotificationsTest::TearDown() {
 #if defined(USE_AURA)
   wm_state_.reset();
 #endif
+#if defined(OS_WIN)

[dewittj, 2014/03/03 22:48:55]

Same #define comment here.

+    com_initializer_.reset();
+#endif
   ui::ShutdownInputMethodForTesting();
 }