Add context to gfx::Screen calls in support of simultaneous desktop+ash

chrome/browser/ui/ash/ash_util.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 "chrome/browser/ui/ash/ash_util.h"
 
 #include "ash/shell.h"
 #include "chrome/browser/ui/ash/ash_init.h"
 #include "ui/aura/root_window.h"
 
@@ skipping 18 matching lines @@
   }
 
   return false;
 }
 
 bool IsNativeWindowInAsh(gfx::NativeWindow native_window) {
   return IsNativeViewInAsh(native_window);
 }
 
 void ToggleAshDesktop() {
+  // TODO(scottmg): Probably need to force Ash here. http://crbug.com/133312
   if (!ash::Shell::HasInstance())
     OpenAsh();
   else
     CloseAsh();
 }
 
 }  // namespace chrome