Move WindowResizer to CoreWM.

ash/screen_ash.cc

Index: ash/screen_ash.cc
===================================================================
--- ash/screen_ash.cc	(revision 173169)
+++ ash/screen_ash.cc	(working copy)
@@ -17,6 +17,7 @@
 #include "ui/aura/root_window.h"
 #include "ui/gfx/display.h"
 #include "ui/gfx/screen.h"
+#include "ui/views/corewm/screen_util.h"
 
 namespace ash {
 
@@ -54,27 +55,19 @@
 
 // static
 gfx::Rect ScreenAsh::GetDisplayWorkAreaBoundsInParent(aura::Window* window) {
-  return ConvertRectFromScreen(
-      window->parent(),
-      Shell::GetScreen()->GetDisplayNearestWindow(window).work_area());
+  return views::corewm::GetDisplayWorkAreaBoundsInParent(window);
 }
 
 // static
 gfx::Rect ScreenAsh::ConvertRectToScreen(aura::Window* window,
                                          const gfx::Rect& rect) {
-  gfx::Point point = rect.origin();
-  aura::client::GetScreenPositionClient(window->GetRootWindow())->
-      ConvertPointToScreen(window, &point);
-  return gfx::Rect(point, rect.size());
+  return views::corewm::ConvertRectToScreen(window, rect);
 }
 
 // static
 gfx::Rect ScreenAsh::ConvertRectFromScreen(aura::Window* window,
                                            const gfx::Rect& rect) {
-  gfx::Point point = rect.origin();
-  aura::client::GetScreenPositionClient(window->GetRootWindow())->
-      ConvertPointFromScreen(window, &point);
-  return gfx::Rect(point, rect.size());
+  return views::corewm::ConvertRectFromScreen(window, rect);
 }
 
 // static