[win8] Force browsers created with Chrome in Metro mode to be on the Ash desktop.

chrome/browser/ui/browser_window.h

 // Copyright 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.
 
 #ifndef CHROME_BROWSER_UI_BROWSER_WINDOW_H_
 #define CHROME_BROWSER_UI_BROWSER_WINDOW_H_
 
 #include "base/callback_forward.h"
 #include "chrome/browser/lifetime/browser_close_manager.h"
 #include "chrome/browser/ui/bookmarks/bookmark_bar.h"
@@ skipping 330 matching lines @@
   virtual void UpdatePreferredSize(content::WebContents* web_contents,
                                    const gfx::Size& pref_size) {}
 
   // Invoked when the contents auto-resized and the container should match it.
   virtual void ResizeDueToAutoResize(content::WebContents* web_contents,
                                      const gfx::Size& new_size) {}
 
   // Construct a BrowserWindow implementation for the specified |browser|.
   static BrowserWindow* CreateBrowserWindow(Browser* browser);
 
+  // Returns a HostDesktopType that is compatible with the current Chrome window
+  // configuration. On Windows with Ash, this is always HOST_DESKTOP_TYPE_ASH
+  // while Chrome is running in Metro mode. Otherwise returns |desktop_type|.
+  static chrome::HostDesktopType AdjustHostDesktopType(
+      chrome::HostDesktopType desktop_type);
+
   // Shows the avatar bubble inside |web_contents|. The bubble is positioned
   // relative to |rect|. |rect| should be in the |web_contents| coordinate
   // system.
   virtual void ShowAvatarBubble(content::WebContents* web_contents,
                                 const gfx::Rect& rect) = 0;
 
   // Shows the avatar bubble on the window frame off of the avatar button.
   virtual void ShowAvatarBubbleFromAvatarButton() = 0;
 
   // Show bubble for password generation positioned relative to |rect|. The
@@ skipping 45 matching lines @@
 
   // Returns the ToolbarView.
   virtual ToolbarView* GetToolbarView() const = 0;
 #endif
 
  protected:
   virtual ~BrowserWindowTesting() {}
 };
 
 #endif  // CHROME_BROWSER_UI_BROWSER_WINDOW_H_