Clean up some ash constants.

ash/system/tray/tray_constants.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_SYSTEM_TRAY_TRAY_CONSTANTS_H_
 #define ASH_SYSTEM_TRAY_TRAY_CONSTANTS_H_
 
 #include "ash/ash_export.h"
 
 typedef unsigned int SkColor;
 
 namespace ash {
 
 extern const int kPaddingFromRightEdgeOfScreenBottomAlignment;
 extern const int kPaddingFromBottomOfScreenBottomAlignment;
 extern const int kPaddingFromOuterEdgeOfLauncherVerticalAlignment;
 extern const int kPaddingFromInnerEdgeOfLauncherVerticalAlignment;
 extern const int kPaddingFromBottomOfScreenVerticalAlignment;
 
 extern const int kBubblePaddingHorizontalBottom;
 extern const int kBubblePaddingHorizontalSide;
 extern const int kBubblePaddingVerticalBottom;
 extern const int kBubblePaddingVerticalSide;
 
+// The size delta between the default font and the font size found in tray
+// items like labels and buttons.
+extern const int kTrayTextFontSizeIncrease;
+
 extern const int kTrayBubbleAnchorTopInsetBottomAnchor;
 
 extern const int kTrayImageItemHorizontalPaddingVerticalAlignment;
 
 ASH_EXPORT extern const int kTrayItemSize;
 
 // Extra padding used beside a single icon in the tray area of the shelf.
 extern const int kTrayImageItemPadding;
 
 extern const int kTrayLabelItemHorizontalPaddingBottomAlignment;
@@ skipping 107 matching lines @@
 extern const int kTrayPopupSystemInfoRowHeight;
 
 namespace test {
 const int kSettingsTrayItemViewId = 10000;
 const int kAccessibilityTrayItemViewId = 10001;
 }  // namespace test
 
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_TRAY_TRAY_CONSTANTS_H_