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

chrome/browser/ui/ash/chrome_shell_delegate.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/chrome_shell_delegate.h"
 
 #include "ash/launcher/launcher_types.h"
 #include "ash/system/tray/system_tray_delegate.h"
 #include "ash/wm/window_util.h"
 #include "base/command_line.h"
@@ skipping 265 matching lines @@
       break;
   }
   return true;
 }
 
 void ChromeShellDelegate::ShowKeyboardOverlay() {
 #if defined(OS_CHROMEOS)
   // TODO(mazda): Move the show logic to ash (http://crbug.com/124222).
   Profile* profile = ProfileManager::GetDefaultProfileOrOffTheRecord();
   std::string url(chrome::kChromeUIKeyboardOverlayURL);
-  KeyboardOverlayView::ShowDialog(profile,
-                                  new ChromeWebContentsHandler,
-                                  GURL(url));
+  ash::KeyboardOverlayView::ShowDialog(profile,
+                                       new ChromeWebContentsHandler,
+                                       GURL(url));
 #endif
 }
 
 void ChromeShellDelegate::ShowTaskManager() {
   Browser* browser = browser::FindOrCreateTabbedBrowser(
       ProfileManager::GetDefaultProfileOrOffTheRecord(),
       chrome::HOST_DESKTOP_TYPE_ASH);
   chrome::OpenTaskManager(browser, false);
 }
 
@@ skipping 163 matching lines @@
       ash::Shell::GetInstance()->ShowLauncher();
       break;
     default:
       NOTREACHED() << "Unexpected notification " << type;
   }
 #else
   // MSVC++ warns about switch statements without any cases.
   NOTREACHED() << "Unexpected notification " << type;
 #endif
 }