Ensure that reposting mouse events on Windows posts the message natively via the PostMessage API.

ui/views/views_delegate.h

 // 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.
 
 #ifndef UI_VIEWS_VIEWS_DELEGATE_H_
 #define UI_VIEWS_VIEWS_DELEGATE_H_
 
 #include <string>
 
 #if defined(OS_WIN)
@@ skipping 71 matching lines @@
   // so that alternate feedback (speech / magnified text) can be provided.
   virtual void NotifyMenuItemFocused(const string16& menu_name,
                                      const string16& menu_item_name,
                                      int item_index,
                                      int item_count,
                                      bool has_submenu) = 0;
 
 #if defined(OS_WIN)
   // Retrieves the default window icon to use for windows if none is specified.
   virtual HICON GetDefaultWindowIcon() const = 0;
+  // Returns true if the window passed in is in the Windows 8 metro
+  // environment.
+  virtual bool IsWindowInMetro(gfx::NativeWindow window) const = 0;
 #elif defined(OS_LINUX) && !defined(OS_CHROMEOS)
   virtual gfx::ImageSkia* GetDefaultWindowIcon() const = 0;
 #endif
 
   // Creates a default NonClientFrameView to be used for windows that don't
   // specify their own. If this function returns NULL, the
   // views::CustomFrameView type will be used.
   virtual NonClientFrameView* CreateDefaultNonClientFrameView(
       Widget* widget) = 0;
 
@@ skipping 19 matching lines @@
   // Returns the default obscured text reveal duration.
   virtual base::TimeDelta GetDefaultTextfieldObscuredRevealDuration() = 0;
 
  private:
   scoped_ptr<ViewsTouchSelectionControllerFactory> views_tsc_factory_;
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_VIEWS_DELEGATE_H_