Removes most aura dependencies from WindowResizer

ash/wm/default_window_resizer.h

Index: ash/wm/default_window_resizer.h
diff --git a/ash/wm/default_window_resizer.h b/ash/wm/default_window_resizer.h
index fbf75ec9755475c7cbf38e7a6b3e7f8686afbce0..737d705dfa2310e1d9b0cf4a7de8bc8bb9448559 100644
--- a/ash/wm/default_window_resizer.h
+++ b/ash/wm/default_window_resizer.h
@@ -10,6 +10,9 @@
 #include "base/macros.h"
 
 namespace ash {
+namespace wm {
+class WmGlobals;
+}
 
 // WindowResizer is used by ToplevelWindowEventFilter to handle dragging, moving
 // or resizing a window. All coordinates passed to this are in the parent
@@ -40,6 +43,8 @@ class ASH_EXPORT DefaultWindowResizer : public WindowResizer {
   // Set to true once Drag() is invoked and the bounds of the window change.
   bool did_move_or_resize_;
 
+  wm::WmGlobals* globals_;
+
   DISALLOW_COPY_AND_ASSIGN(DefaultWindowResizer);
 };