Consolidate volume control code.

ash/system/tray/system_tray.cc

 // Copyright (c) 2012 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 "ash/system/tray/system_tray.h"
 
 #include "ash/shell.h"
 #include "ash/shell/panel_window.h"
 #include "ash/shell_window_ids.h"
 #include "ash/system/audio/tray_volume.h"
@@ skipping 243 matching lines @@
 }
 
 void SystemTray::UpdateAfterShelfAlignmentChange(ShelfAlignment alignment) {
   for (std::vector<SystemTrayItem*>::iterator it = items_.begin();
       it != items_.end();
       ++it) {
     (*it)->UpdateAfterShelfAlignmentChange(alignment);
   }
 }
 
+void SystemTray::UpdateAfterAshInit() {
+  for (std::vector<SystemTrayItem*>::iterator it = items_.begin();
+      it != items_.end();
+      ++it) {
+    (*it)->UpdateAfterAshInit();
+  }
+}
+
 void SystemTray::SetHideNotifications(bool hide_notifications) {
   if (notification_bubble_.get())
     notification_bubble_->SetVisible(!hide_notifications);
   hide_notifications_ = hide_notifications;
 }
 
 bool SystemTray::IsAnyBubbleVisible() const {
   if (bubble_.get() && bubble_->IsVisible())
     return true;
   if (notification_bubble_.get() && notification_bubble_->IsVisible())
@@ skipping 229 matching lines @@
 
 void SystemTray::OnPaintFocusBorder(gfx::Canvas* canvas) {
   // The tray itself expands to the right and bottom edge of the screen to make
   // sure clicking on the edges brings up the popup. However, the focus border
   // should be only around the container.
   if (GetWidget() && GetWidget()->IsActive())
     DrawBorder(canvas, GetContentsBounds());
 }
 
 }  // namespace ash