Move WindowResizer to CoreWM.

ash/wm/drag_window_resizer.cc

Index: ash/wm/drag_window_resizer.cc
===================================================================
--- ash/wm/drag_window_resizer.cc	(revision 173169)
+++ ash/wm/drag_window_resizer.cc	(working copy)
@@ -58,10 +58,11 @@
 }
 
 // static
-DragWindowResizer* DragWindowResizer::Create(WindowResizer* window_resizer,
-                                             aura::Window* window,
-                                             const gfx::Point& location,
-                                             int window_component) {
+DragWindowResizer* DragWindowResizer::Create(
+    views::corewm::WindowResizer* window_resizer,
+    aura::Window* window,
+    const gfx::Point& location,
+    int window_component) {
   Details details(window, location, window_component);
   return details.is_resizable ?
       new DragWindowResizer(window_resizer, details) : NULL;
@@ -122,8 +123,9 @@
   return window_resizer_->GetTarget();
 }
 
-DragWindowResizer::DragWindowResizer(WindowResizer* window_resizer,
-                                     const Details& details)
+DragWindowResizer::DragWindowResizer(
+    views::corewm::WindowResizer* window_resizer,
+    const Details& details)
     : window_resizer_(window_resizer),
       details_(details),
       destroyed_(NULL) {