Mac: Enable WebAppShortcutCreatorTest.CreateShortcut unit test

chrome/app/app_mode_loader_mac.mm

 // 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.
 
 // On Mac, shortcuts can't have command-line arguments. Instead, produce small
 // app bundles which locate the Chromium framework and load it, passing the
 // appropriate data. This is the code for such an app bundle. It should be kept
 // minimal and do as little work as possible (with as much work done on
 // framework side as possible).
 
@@ skipping 68 matching lines @@
 
   // Read information about the this app shortcut from the Info.plist.
   // Don't check for null-ness on optional items.
   NSDictionary* info_plist = [app_bundle infoDictionary];
   CHECK(info_plist) << "couldn't get loader Info.plist";
 
   info->app_mode_id = SysNSStringToUTF8(
       [info_plist objectForKey:app_mode::kCrAppModeShortcutIDKey]);
   CHECK(info->app_mode_id.size()) << "couldn't get app shortcut ID";
 
-  info->app_mode_short_name = SysNSStringToUTF16(
-      [info_plist objectForKey:app_mode::kCrAppModeShortcutShortNameKey]);
-
   info->app_mode_name = SysNSStringToUTF16(
       [info_plist objectForKey:app_mode::kCrAppModeShortcutNameKey]);
 
   info->app_mode_url = SysNSStringToUTF8(
       [info_plist objectForKey:app_mode::kCrAppModeShortcutURLKey]);
 
   info->user_data_dir = base::mac::NSStringToFilePath(
       [info_plist objectForKey:app_mode::kCrAppModeUserDataDirKey]);
 
   info->extension_path = base::mac::NSStringToFilePath(
@@ skipping 22 matching lines @@
 
   typedef int (*StartFun)(const app_mode::ChromeAppModeInfo*);
   StartFun ChromeAppModeStart = (StartFun)dlsym(cr_dylib, "ChromeAppModeStart");
   CHECK(ChromeAppModeStart) << "couldn't get entry point";
 
   // Exit instead of returning to avoid the the removal of |main()| from stack
   // backtraces under tail call optimization.
   int rv = ChromeAppModeStart(&info);
   exit(rv);
 }