Always use a /prefetch:# switch when launching a process on Windows.

chrome/chrome.gyp

 # 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.
 {
   'variables': {
     'chromium_code': 1,
 
     # Define the common dependencies that contain all the actual
     # Chromium functionality.  This list gets pulled in below by
     # the link of the actual chrome (or chromium) executable on
@@ skipping 708 matching lines @@
             ['OS!="win" and use_cups!=1', {
               'sources': [
                 'service/cloud_print/print_system_dummy.cc',
               ],
             }],
             ['OS=="win"', {
               'sources': [
                 'service/service_utility_process_host.cc',
                 'service/service_utility_process_host.h',
               ],
-              'deps': [
-                # TODO(fdoray): Remove this once the PreRead field trial has
-                # expired. crbug.com/577698
-                '../components/components.gyp:startup_metric_utils_win',
-              ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }