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

ui/views/event_utils_aura.cc

 // Copyright 2013 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 "ui/views/event_utils.h"
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/aura/client/screen_position_client.h"
 #include "ui/aura/root_window.h"
 #include "ui/events/event.h"
 #include "ui/gfx/point.h"
+#include "ui/views/views_delegate.h"
 
 using aura::client::ScreenPositionClient;
 
 namespace views {
 
 bool RepostLocatedEvent(gfx::NativeWindow window,
                         const ui::LocatedEvent& event) {
   if (!window)
     return false;
 
+#if defined(OS_WIN)
+  if (ViewsDelegate::views_delegate &&
+      !ViewsDelegate::views_delegate->IsWindowInMetro(window)) {
+    return RepostLocatedEventWin(
+        window->GetDispatcher()->host()->GetAcceleratedWidget(), event);
+  }
+#endif
   aura::Window* root_window = window->GetRootWindow();
 
   gfx::Point root_loc(event.location());
   ScreenPositionClient* spc =
       aura::client::GetScreenPositionClient(root_window);
   if (!spc)
     return false;
 
   spc->ConvertPointFromScreen(root_window, &root_loc);
 
@@ skipping 10 matching lines @@
     return false;
   }
   relocated->set_location(root_loc);
   relocated->set_root_location(root_loc);
 
   root_window->GetDispatcher()->RepostEvent(*relocated);
   return true;
 }
 
 }  // namespace views