Introduce system_info as an independent container.

athena/home/home_card_constants.cc

 // Copyright 2014 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.
 
 #include "athena/home/home_card_constants.h"
 
 namespace athena {
 
 const int kHomeCardHeight = 212;
 const int kHomeCardDragIndicatorHeight = 2;
 const int kHomeCardDragIndicatorWidth = 48;
 const int kHomeCardDragIndicatorMarginHeight = 7;
 const int kHomeCardMinimizedHeight =
     kHomeCardDragIndicatorMarginHeight * 2 + kHomeCardDragIndicatorHeight;
-const int kSystemUIHeight = 24;
 const int kHomeCardSearchBoxId = 1000;
 
 }  // namespace athena