Fix incorrect position of Native Viewport contents on Windows

mojo/services/view_manager/window_tree_host_impl.cc

 // Copyright (c) 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 "mojo/services/view_manager/window_tree_host_impl.h"
 
 #include "mojo/public/c/gles2/gles2.h"
 #include "mojo/services/public/cpp/geometry/geometry_type_converters.h"
 #include "mojo/services/view_manager/context_factory_impl.h"
 #include "ui/aura/env.h"
@@ skipping 118 matching lines @@
 ////////////////////////////////////////////////////////////////////////////////
 // WindowTreeHostImpl, NativeViewportClient implementation:
 
 void WindowTreeHostImpl::OnCreated() {
   CreateCompositor(GetAcceleratedWidget());
   compositor_created_callback_.Run();
 }
 
 void WindowTreeHostImpl::OnBoundsChanged(RectPtr bounds) {
   bounds_ = bounds.To<gfx::Rect>();
-  window()->SetBounds(gfx::Rect(bounds_.size()));
   OnHostResized(bounds_.size());
 }
 
 void WindowTreeHostImpl::OnDestroyed() {
   base::MessageLoop::current()->Quit();
 }
 
 void WindowTreeHostImpl::OnEvent(EventPtr event,
                                  const mojo::Callback<void()>& callback) {
   switch (event->action) {
@@ skipping 19 matching lines @@
       break;
     }
     // TODO(beng): touch, etc.
   }
   callback.Run();
 };
 
 }  // namespace service
 }  // namespace view_manager
 }  // namespace mojo