mash: Convert ash shelf overflow bubble to wm common types

ash/common/shelf/overflow_button.h

Index: ash/common/shelf/overflow_button.h
diff --git a/ash/shelf/overflow_button.h b/ash/common/shelf/overflow_button.h
similarity index 86%
rename from ash/shelf/overflow_button.h
rename to ash/common/shelf/overflow_button.h
index a101b3e87df72dd92e0026151893cb54d58b567b..ac2a4faf2b65a1fa037eed75d7426d36c92500a6 100644
--- a/ash/shelf/overflow_button.h
+++ b/ash/common/shelf/overflow_button.h
@@ -2,23 +2,21 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef ASH_SHELF_OVERFLOW_BUTTON_H_
-#define ASH_SHELF_OVERFLOW_BUTTON_H_
+#ifndef ASH_COMMON_SHELF_OVERFLOW_BUTTON_H_
+#define ASH_COMMON_SHELF_OVERFLOW_BUTTON_H_
 
-#include "ash/common/shelf/shelf_types.h"
-#include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "ui/gfx/image/image_skia.h"
 #include "ui/views/controls/button/custom_button.h"
 
 namespace ash {
 class InkDropButtonListener;
-class Shelf;
+class WmShelf;
 
 // Shelf overflow chevron button.
 class OverflowButton : public views::CustomButton {
  public:
-  OverflowButton(InkDropButtonListener* listener, Shelf* shelf);
+  OverflowButton(InkDropButtonListener* listener, WmShelf* wm_shelf);
   ~OverflowButton() override;
 
   void OnShelfAlignmentChanged();
@@ -58,11 +56,11 @@ class OverflowButton : public views::CustomButton {
   gfx::ImageSkia right_image_;
 
   InkDropButtonListener* listener_;
-  Shelf* shelf_;
+  WmShelf* wm_shelf_;
 
   DISALLOW_COPY_AND_ASSIGN(OverflowButton);
 };
 
 }  // namespace ash
 
-#endif  // ASH_SHELF_OVERFLOW_BUTTON_H_
+#endif  // ASH_COMMON_SHELF_OVERFLOW_BUTTON_H_