Use a valid /prefetch argument when launching a process.

chrome/chrome_installer_util.gypi

 # 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.
 
 {
   'target_defaults': {
     'variables': {
       'installer_util_target': 0,
     },
     'target_conditions': [
@@ skipping 104 matching lines @@
           'variables': {
             'installer_util_target': 1,
           },
           'dependencies': [
             'installer_util_strings',
             '<(DEPTH)/base/base.gyp:base',
             '<(DEPTH)/base/third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
             '<(DEPTH)/chrome/chrome_resources.gyp:chrome_strings',
             '<(DEPTH)/chrome/common_constants.gyp:common_constants',
             '<(DEPTH)/components/components.gyp:metrics',
+            # TODO(fdoray): Remove this once the PreRead field trial has
+            # expired. crbug.com/577698
+            '<(DEPTH)/components/components.gyp:startup_metric_utils_common',
             '<(DEPTH)/components/components.gyp:variations',
             '<(DEPTH)/courgette/courgette.gyp:courgette_lib',
             '<(DEPTH)/crypto/crypto.gyp:crypto',
             '<(DEPTH)/third_party/bspatch/bspatch.gyp:bspatch',
             '<(DEPTH)/third_party/crashpad/crashpad/client/client.gyp:crashpad_client',
             '<(DEPTH)/third_party/icu/icu.gyp:icui18n',
             '<(DEPTH)/third_party/icu/icu.gyp:icuuc',
             '<(DEPTH)/third_party/lzma_sdk/lzma_sdk.gyp:lzma_sdk',
           ],
           'sources': [
@@ skipping 96 matching lines @@
           ],
           'include_dirs': [
             '<(DEPTH)',
           ],
         }
       ],
     }],
 
   ],
 }