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

ui/views/test/test_views_delegate.h

Index: ui/views/test/test_views_delegate.h
===================================================================
--- ui/views/test/test_views_delegate.h	(revision 238186)
+++ ui/views/test/test_views_delegate.h	(working copy)
@@ -50,6 +50,10 @@
   virtual HICON GetDefaultWindowIcon() const OVERRIDE {
     return NULL;
   }
+
+  virtual bool IsWindowInMetro(gfx::NativeWindow window) const {
+    return false;
+  }
 #elif defined(OS_LINUX) && !defined(OS_CHROMEOS)
   virtual gfx::ImageSkia* GetDefaultWindowIcon() const OVERRIDE;
 #endif