Implement new slider control and disable the volume control when audio is muted.

ash/system/tray/tray_views.cc

Index: ash/system/tray/tray_views.cc
diff --git a/ash/system/tray/tray_views.cc b/ash/system/tray/tray_views.cc
index c62b3f5418b711590d7fb3df3dd7737849386f0d..55d36fd3f65f1281584b6cccbfbe327a3c05928c 100644
--- a/ash/system/tray/tray_views.cc
+++ b/ash/system/tray/tray_views.cc
@@ -29,15 +29,15 @@ const int kIconPaddingLeft = 5;
 const int kPaddingAroundButtons = 5;
 
 const int kBarImagesActive[] = {
-  IDR_AURA_UBER_TRAY_BAR_BUTTON_ACTIVE_LEFT,
-  IDR_AURA_UBER_TRAY_BAR_BUTTON_ACTIVE_CENTER,
-  IDR_AURA_UBER_TRAY_BAR_BUTTON_ACTIVE_RIGHT,
+    IDR_SLIDER_ACTIVE_LEFT,
+    IDR_SLIDER_ACTIVE_CENTER,
+    IDR_SLIDER_ACTIVE_RIGHT,
 };
 
 const int kBarImagesDisabled[] = {
-  IDR_AURA_UBER_TRAY_BAR_BUTTON_DISABLED_LEFT,
-  IDR_AURA_UBER_TRAY_BAR_BUTTON_DISABLED_CENTER,
-  IDR_AURA_UBER_TRAY_BAR_BUTTON_DISABLED_RIGHT,
+    IDR_SLIDER_DISABLED_LEFT,
+    IDR_SLIDER_DISABLED_CENTER,
+    IDR_SLIDER_DISABLED_RIGHT,
 };
 
 views::View* CreatePopupHeaderButtonsContainer() {