Remove some pass-thrus on RootWindow API in favor of exposing the RootWindowHost again.

ui/views/widget/desktop_aura/desktop_screen_position_client.cc

 // 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.
 
 #include "ui/views/widget/desktop_aura/desktop_screen_position_client.h"
 
 #include "ui/aura/root_window.h"
 #include "ui/gfx/display.h"
 #include "ui/gfx/point_conversions.h"
 #include "ui/gfx/screen.h"
 #include "ui/views/widget/desktop_aura/desktop_native_widget_aura.h"
 
 namespace views {
 
 namespace {
 
 gfx::Point GetOrigin(const aura::Window* root_window) {
-  gfx::Point origin_in_pixels = root_window->GetDispatcher()->GetHostOrigin();
+  gfx::Point origin_in_pixels =
+      root_window->GetDispatcher()->host()->GetBounds().origin();
   aura::Window* window = const_cast<aura::Window*>(root_window);
   float scale = gfx::Screen::GetScreenFor(window)->
        GetDisplayNearestWindow(window).device_scale_factor();
   return gfx::ToFlooredPoint(
       gfx::ScalePoint(origin_in_pixels, 1 / scale));
 }
 
 // Returns true if bounds passed to window are treated as though they are in
 // screen coordinates.
 bool PositionWindowInScreenCoordinates(aura::Window* window) {
@@ skipping 60 matching lines @@
       DesktopNativeWidgetAura::ForWindow(window);
   if (desktop_native_widget) {
     root->GetDispatcher()->SetHostBounds(bounds);
     // Setting bounds of root resizes |window|.
   } else {
     window->SetBounds(bounds);
   }
 }
 
 }  // namespace views