Refactors WindowResizers to use ash/wm/common

ash/wm/common/shelf/wm_shelf.h

Index: ash/wm/common/shelf/wm_shelf.h
diff --git a/ash/wm/common/shelf/wm_shelf.h b/ash/wm/common/shelf/wm_shelf.h
index 2bcac6e1af0bac3d3ef0a8ada0965e3b669a053f..488400addbf0f27b10474f3dd4ce97afd7492875 100644
--- a/ash/wm/common/shelf/wm_shelf.h
+++ b/ash/wm/common/shelf/wm_shelf.h
@@ -8,6 +8,10 @@
 #include "ash/ash_export.h"
 #include "ash/wm/common/shelf/wm_shelf_types.h"
 
+namespace gfx {
+class Rect;
+}
+
 namespace ash {
 namespace wm {
 
@@ -20,12 +24,21 @@ class ASH_EXPORT WmShelf {
   // Returns the window showing the shelf.
   virtual WmWindow* GetWindow() = 0;
 
-  virtual ShelfAlignment GetAlignment() = 0;
+  virtual ShelfAlignment GetAlignment() const = 0;
 
-  virtual ShelfBackgroundType GetBackgroundType() = 0;
+  virtual ShelfBackgroundType GetBackgroundType() const = 0;
 
   virtual void UpdateVisibilityState() = 0;
 
+  virtual ShelfVisibilityState GetVisibilityState() const = 0;
+
+  virtual void UpdateIconPositionForWindow(WmWindow* window) = 0;
+
+  // Returns the screen bounds of the item for the specified window. If there is
+  // no item for the specified window an empty rect is returned.
+  virtual gfx::Rect GetScreenBoundsOfItemIconForWindow(
+      wm::WmWindow* window) = 0;
+
   virtual void AddObserver(WmShelfObserver* observer) = 0;
   virtual void RemoveObserver(WmShelfObserver* observer) = 0;