Update shelf spacing in Chrome OS according to the MD specs

ash/shelf/shelf_button.cc

 // 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.
 
 #include "ash/shelf/shelf_button.h"
 
 #include <algorithm>
 
 #include "ash/ash_switches.h"
 #include "ash/common/ash_constants.h"
@@ skipping 491 matching lines @@
     bar_id = IDR_ASH_SHELF_UNDERLINE_ACTIVE;
   else if (state_ & STATE_ATTENTION)
     bar_id = IDR_ASH_SHELF_UNDERLINE_ATTENTION;
   else if (state_ & STATE_RUNNING)
     bar_id = IDR_ASH_SHELF_UNDERLINE_RUNNING;
 
   if (bar_id != 0) {
     Shelf* shelf = shelf_view_->shelf();
     gfx::ImageSkia image;
     if (ash::MaterialDesignController::IsShelfMaterial()) {
-      gfx::Size size(kShelfButtonSize, kShelfSize);
+      gfx::Size size(GetShelfConstant(SHELF_BUTTON_SIZE),
+                     GetShelfConstant(SHELF_SIZE));
       gfx::Canvas canvas(size, kIndicatorCanvasScale, true /* is_opaque */);
       PaintIndicatorOnCanvas(&canvas, size);
       image = gfx::ImageSkia(canvas.ExtractImageRep());
     } else {
       ResourceBundle* rb = &ResourceBundle::GetSharedInstance();
       image = *rb->GetImageNamed(bar_id).ToImageSkia();
     }
     if (!shelf->IsHorizontalAlignment()) {
       image = gfx::ImageSkiaOperations::CreateRotatedImage(
           image, shelf->alignment() == SHELF_ALIGNMENT_LEFT
                      ? SkBitmapOperations::ROTATION_90_CW
                      : SkBitmapOperations::ROTATION_270_CW);
     }
     bar_->SetImage(image);
     bar_->SetHorizontalAlignment(shelf->SelectValueForShelfAlignment(
         views::ImageView::CENTER, views::ImageView::LEADING,
         views::ImageView::TRAILING));
     bar_->SetVerticalAlignment(shelf->SelectValueForShelfAlignment(
         views::ImageView::TRAILING, views::ImageView::CENTER,
         views::ImageView::CENTER));
     bar_->SchedulePaint();
   }
   bar_->SetVisible(bar_id != 0 && state_ != STATE_NORMAL);
 }
 
 }  // namespace ash