ash: Rename LauncherButtonHost to ShelfButtonHost.

ash/shelf/alternate_app_list_button.h

 // Copyright 2013 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_SHELF_ALTERNATE_APP_LIST_BUTTON_H_
 #define ASH_SHELF_ALTERNATE_APP_LIST_BUTTON_H_
 
 #include "ui/views/controls/button/image_button.h"
 
 namespace ash {
 
 class ShelfWidget;
 
 namespace internal {
 
-class LauncherButtonHost;
+class ShelfButtonHost;
 
-// Button used for the AppList icon on the launcher.
-// This class is an alternate implementation to
-// ash::internal::AppListButton for the purposes of testing an
-// alternate shelf layout (see ash_switches: UseAlternateShelfLayout).
+// Button used for the AppList icon on the shelf.
+// This class is an alternate implementation to ash::internal::AppListButton
+// for the purposes of testing an alternate shelf layout
+// (see ash_switches: UseAlternateShelfLayout).
 class AlternateAppListButton : public views::ImageButton {
  public:
   // Bounds size (inset) required for the app icon image (in pixels).
   static const int kImageBoundsSize;
 
   AlternateAppListButton(views::ButtonListener* listener,
-                         LauncherButtonHost* host,
+                         ShelfButtonHost* host,
                          ShelfWidget* shelf_widget);
   virtual ~AlternateAppListButton();
 
  protected:
   // views::ImageButton overrides:
   virtual bool OnMousePressed(const ui::MouseEvent& event) OVERRIDE;
   virtual void OnMouseReleased(const ui::MouseEvent& event) OVERRIDE;
   virtual void OnMouseCaptureLost() OVERRIDE;
   virtual bool OnMouseDragged(const ui::MouseEvent& event) OVERRIDE;
   virtual void OnMouseMoved(const ui::MouseEvent& event) OVERRIDE;
   virtual void OnMouseEntered(const ui::MouseEvent& event) OVERRIDE;
   virtual void OnMouseExited(const ui::MouseEvent& event) OVERRIDE;
   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
   virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE;
 
   // ui::EventHandler overrides:
   virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
 
  private:
-  LauncherButtonHost* host_;
+  ShelfButtonHost* host_;
   // Reference to the shelf widget containing this button, owned by the
   // root window controller.
   ShelfWidget* shelf_widget_;
 
   DISALLOW_COPY_AND_ASSIGN(AlternateAppListButton);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_SHELF_ALTERNATE_APP_LIST_BUTTON_H_