Removes most aura dependencies from WindowResizer

ash/display/screen_ash.cc

 // Copyright 2014 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 "ash/display/screen_ash.h"
 
 #include "ash/display/display_manager.h"
 #include "ash/display/window_tree_host_manager.h"
 #include "ash/root_window_controller.h"
 #include "ash/root_window_settings.h"
 #include "ash/shelf/shelf_layout_manager.h"
 #include "ash/shelf/shelf_widget.h"
 #include "ash/shell.h"
-#include "ash/wm/coordinate_conversion.h"
+#include "ash/wm/aura/wm_window_aura.h"
+#include "ash/wm/common/root_window_finder.h"
 #include "base/logging.h"
 #include "ui/aura/client/screen_position_client.h"
 #include "ui/aura/env.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/gfx/display.h"
 #include "ui/gfx/display_finder.h"
 #include "ui/gfx/screen.h"
 
 namespace ash {
 
@@ skipping 72 matching lines @@
 gfx::Point ScreenAsh::GetCursorScreenPoint() {
   return aura::Env::GetInstance()->last_mouse_location();
 }
 
 gfx::NativeWindow ScreenAsh::GetWindowUnderCursor() {
   return GetWindowAtScreenPoint(
       gfx::Screen::GetScreen()->GetCursorScreenPoint());
 }
 
 gfx::NativeWindow ScreenAsh::GetWindowAtScreenPoint(const gfx::Point& point) {
-  aura::Window* root_window = wm::GetRootWindowAt(point);
+  aura::Window* root_window =
+      wm::WmWindowAura::GetAuraWindow(wm::GetRootWindowAt(point));
   aura::client::ScreenPositionClient* position_client =
       aura::client::GetScreenPositionClient(root_window);
 
   gfx::Point local_point = point;
   if (position_client)
     position_client->ConvertPointFromScreen(root_window, &local_point);
 
   return root_window->GetTopWindowContainingPoint(local_point);
 }
 
@@ skipping 59 matching lines @@
 
 void ScreenAsh::RemoveObserver(gfx::DisplayObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
 gfx::Screen* ScreenAsh::CloneForShutdown() {
   return new ScreenForShutdown(this);
 }
 
 }  // namespace ash