Update shelf spacing in Chrome OS according to the MD specs

chrome/browser/ui/ash/launcher/chrome_launcher_controller_impl_browsertest.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 "chrome/browser/ui/ash/launcher/chrome_launcher_controller_impl.h"
 
 #include <stddef.h>
 
 #include "ash/ash_switches.h"
 #include "ash/common/shelf/shelf_constants.h"
@@ skipping 840 matching lines @@
       shelf_model()->items()[shelf_item_count - 1];
   const LauncherItemController* app_item_controller =
       GetItemController(app_item.id);
   const LauncherItemController* panel_item_controller =
       GetItemController(panel_item.id);
   // Icons for Apps are set by the AppWindowLauncherController, so
   // image_set_by_controller() should be set.
   EXPECT_TRUE(app_item_controller->image_set_by_controller());
   EXPECT_TRUE(panel_item_controller->image_set_by_controller());
   // Ensure icon heights are correct (see test.js in app_icon/ test directory)
-  EXPECT_EQ(ash::kShelfSize, app_item.image.height());
+  EXPECT_EQ(ash::GetShelfConstant(ash::SHELF_SIZE), app_item.image.height());
   EXPECT_EQ(64, panel_item.image.height());
 }
 
 // Test that we can launch an app with a shortcut.
 IN_PROC_BROWSER_TEST_F(ShelfAppBrowserTest, LaunchPinned) {
   TabStripModel* tab_strip = browser()->tab_strip_model();
   int tab_count = tab_strip->count();
   ash::ShelfID shortcut_id = CreateShortcut("app1");
   EXPECT_EQ(ash::STATUS_CLOSED, (*model_->ItemByID(shortcut_id)).status);
   ActivateShelfItem(model_->ItemIndexByID(shortcut_id));
@@ skipping 1423 matching lines @@
   // Close all windows.
   CloseBrowserWindow(browser(), menu1.get(), LauncherContextMenu::MENU_CLOSE);
   EXPECT_EQ(0u, BrowserList::GetInstance()->size());
 
   // Check if "Close" is removed from the context menu.
   std::unique_ptr<LauncherContextMenu> menu2 =
       CreateLauncherContextMenu(ash::TYPE_BROWSER_SHORTCUT);
   ASSERT_FALSE(
       IsItemPresentInMenu(menu2.get(), LauncherContextMenu::MENU_CLOSE));
 }