Shelf Cleanup AlternateShelfLayout P1 Attempt 3

ash/shelf/shelf_constants.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_SHELF_CONSTANTS_H_
 #define ASH_SHELF_SHELF_CONSTANTS_H_
 
 #include "ash/ash_export.h"
 
 namespace ash {
 
-// Height of the shelf. Hard coded to avoid resizing as items are added/removed.
-ASH_EXPORT extern const int kShelfPreferredSize;
-
 // Max alpha of the shelf background.
 ASH_EXPORT extern const int kShelfBackgroundAlpha;
 
 // Invalid image resource id used for ShelfItemDetails.
 extern const int kInvalidImageResourceID;
 
 extern const int kInvalidShelfID;
 
+// Size of the shelf when visible (height when the shelf is horizontal).
+ASH_EXPORT extern const int kShelfSize;
+
+// Size of the space between buttons on the shelf.
+ASH_EXPORT extern const int kShelfButtonSpacing;
+
+// Size allocated for each button on the shelf.
+ASH_EXPORT extern const int kShelfButtonSize;
+
 // Animation duration for switching black shelf and dock background on and off.
 ASH_EXPORT extern const int kTimeToSwitchBackgroundMs;
 
 // The direction of the focus cycling.
 enum CycleDirection {
   CYCLE_FORWARD,
   CYCLE_BACKWARD
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELF_SHELF_CONSTANTS_H_