Update shelf spacing in Chrome OS according to the MD specs

chrome/browser/ui/ash/launcher/chrome_launcher_controller_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.h"
 
 #include <stddef.h>
 
 #include "ash/ash_switches.h"
 #include "ash/shelf/shelf.h"
@@ skipping 802 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::GetShelfLayoutConstant(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 1397 matching lines @@
   controller_->ActivateApp(bookmark_app->id(), ash::LAUNCH_FROM_APP_LIST, 0);
 
   // There should be two new browsers.
   EXPECT_EQ(3u, chrome::GetBrowserCount(browser()->profile()));
 
   // The apps should now be running, with the last opened app active.
   EXPECT_EQ(ash::STATUS_RUNNING, model_->ItemByID(hosted_app_shelf_id)->status);
   EXPECT_EQ(ash::STATUS_ACTIVE,
             model_->ItemByID(bookmark_app_shelf_id)->status);
 }