Give Ash material design tray items the correct size and layout

ash/common/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_COMMON_SHELF_SHELF_CONSTANTS_H_
 #define ASH_COMMON_SHELF_SHELF_CONSTANTS_H_
 
 #include "ash/ash_export.h"
 #include "third_party/skia/include/core/SkColor.h"
 
 namespace ash {
 
 enum ShelfConstant {
   // The alpha value for the shelf background when a window is overlapping.
   SHELF_BACKGROUND_ALPHA,
 
   // Size of the shelf when visible (height when the shelf is horizontal and
   // width when the shelf is vertical).
   SHELF_SIZE,
 
   // Size of the space between buttons on the shelf.
   SHELF_BUTTON_SPACING,
 
-  // Size allocated for each button on the shelf.
+  // Size allocated for each app button on the shelf.
   SHELF_BUTTON_SIZE,
 
   // Insets allocated for shelf when it is auto hidden.
   SHELF_INSETS_FOR_AUTO_HIDE
 };
 
 // Invalid image resource id used for ShelfItemDetails.
 extern const int kInvalidImageResourceID;
 
 // We reserve a small area on the edge of the workspace area to ensure that
@@ skipping 25 matching lines @@
 // using the material design ripple animation.
 ASH_EXPORT extern const SkColor kShelfButtonActivatedHighlightColor;
 
 // Opacity of the ink drop ripple for shelf items when the ripple is visible.
 extern const float kShelfInkDropVisibleOpacity;
 
 // The foreground color of the icons used in the shelf (launcher,
 // notifications, etc).
 ASH_EXPORT extern const SkColor kShelfIconColor;
 
+// The width and height of the material design overflow button.
+// TODO(tdanderson): Refactor constants which are common between the shelf
+// and the tray. See crbug.com/623987.
+extern const int kOverflowButtonSize;
+
+// The radius of the rounded corners of the overflow button.
+extern const int kOverflowButtonCornerRadius;
+
+// The radius of the circular material design app list button.
+extern const int kAppListButtonRadius;
+
 // The direction of the focus cycling.
 enum CycleDirection { CYCLE_FORWARD, CYCLE_BACKWARD };
 
 ASH_EXPORT int GetShelfConstant(ShelfConstant shelf_constant);
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_SHELF_SHELF_CONSTANTS_H_