Shuffles and renames ash/common/wm classes

ash/mus/bridge/wm_shelf_mus.h

Index: ash/mus/bridge/wm_shelf_mus.h
diff --git a/ash/mus/bridge/wm_shelf_mus.h b/ash/mus/bridge/wm_shelf_mus.h
index 60549862ecf16f8dbd2ad6399a2bf6e60c3122b7..a9b6157abf914f2d99d569de005f7a26590c8b3a 100644
--- a/ash/mus/bridge/wm_shelf_mus.h
+++ b/ash/mus/bridge/wm_shelf_mus.h
@@ -25,13 +25,13 @@ class WmShelfMus : public wm::WmShelf {
   ~WmShelfMus() override;
 
   // wm::WmShelf:
-  wm::WmWindow* GetWindow() override;
+  WmWindow* GetWindow() override;
   wm::ShelfAlignment GetAlignment() const override;
   wm::ShelfBackgroundType GetBackgroundType() const override;
   void UpdateVisibilityState() override;
   ShelfVisibilityState GetVisibilityState() const override;
-  void UpdateIconPositionForWindow(wm::WmWindow* window) override;
-  gfx::Rect GetScreenBoundsOfItemIconForWindow(wm::WmWindow* window) override;
+  void UpdateIconPositionForWindow(WmWindow* window) override;
+  gfx::Rect GetScreenBoundsOfItemIconForWindow(WmWindow* window) override;
   void AddObserver(wm::WmShelfObserver* observer) override;
   void RemoveObserver(wm::WmShelfObserver* observer) override;