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

chrome/browser/ui/views/chrome_views_delegate.cc

Index: chrome/browser/ui/views/chrome_views_delegate.cc
===================================================================
--- chrome/browser/ui/views/chrome_views_delegate.cc	(revision 238186)
+++ chrome/browser/ui/views/chrome_views_delegate.cc	(working copy)
@@ -153,6 +153,11 @@
 HICON ChromeViewsDelegate::GetDefaultWindowIcon() const {
   return GetAppIcon();
 }
+
+bool ChromeViewsDelegate::IsWindowInMetro(gfx::NativeWindow window) const {
+  return chrome::IsNativeViewInAsh(window);
+}
+
 #elif defined(OS_LINUX) && !defined(OS_CHROMEOS)
 gfx::ImageSkia* ChromeViewsDelegate::GetDefaultWindowIcon() const {
   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();