ash: Rename LauncherButtonHost to ShelfButtonHost.

ash/shelf/shelf_button_host.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef ASH_LAUNCHER_LAUNCHER_BUTTON_HOST_H_
-#define ASH_LAUNCHER_LAUNCHER_BUTTON_HOST_H_
+#ifndef ASH_SHELF_SHELF_BUTTON_HOST_H_
+#define ASH_SHELF_SHELF_BUTTON_HOST_H_
 
 #include "ash/ash_export.h"
 #include "base/strings/string16.h"
 
 namespace ui {
 class LocatedEvent;
 }
 
 namespace views {
 class View;
 }
 
 namespace ash {
 namespace internal {
 
-// The launcher buttons communicate back to the host by way of this interface.
-// This interface is used to enable reordering the items on the launcher.
-class ASH_EXPORT LauncherButtonHost {
+// The shelf buttons communicate back to the host by way of this interface.
+// This interface is used to enable reordering the items on the shelf.
+class ASH_EXPORT ShelfButtonHost {
  public:
   enum Pointer {
     NONE,
     DRAG_AND_DROP,
     MOUSE,
     TOUCH,
   };
 
   // Invoked when a pointer device is pressed on a view.
   virtual void PointerPressedOnButton(views::View* view,
@@ skipping 16 matching lines @@
   // Invoked when the mouse enters the item.
   virtual void MouseEnteredButton(views::View* view) = 0;
 
   // Invoked when the mouse exits the item.
   virtual void MouseExitedButton(views::View* view) = 0;
 
   // Invoked to get the accessible name of the item.
   virtual base::string16 GetAccessibleName(const views::View* view) = 0;
 
  protected:
-  virtual ~LauncherButtonHost() {}
+  virtual ~ShelfButtonHost() {}
 };
 
 }  // namespace internal
 }  // namespace ash
 
-#endif  // ASH_LAUNCHER_LAUNCHER_BUTTON_HOST_H_
+#endif  // ASH_SHELF_SHELF_BUTTON_HOST_H_