Use a valid /prefetch argument when launching a process.

chrome/chrome_common.gypi

 # Copyright (c) 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.
 
 {
   'variables': {
     # File lists shared with GN build.
     'chrome_common_sources': [
       'common/all_messages.h',
       'common/attrition_experiments.h',
@@ skipping 320 matching lines @@
         '<(DEPTH)/components/components.gyp:crash_core_common',
         '<(DEPTH)/components/components.gyp:error_page_common',
         '<(DEPTH)/components/components.gyp:favicon_base',
         '<(DEPTH)/components/components.gyp:flags_ui_switches',
         '<(DEPTH)/components/components.gyp:gcm_driver_common',
         '<(DEPTH)/components/components.gyp:json_schema',
         '<(DEPTH)/components/components.gyp:metrics',
         '<(DEPTH)/components/components.gyp:metrics_net',
         '<(DEPTH)/components/components.gyp:omnibox_common',
         '<(DEPTH)/components/components.gyp:policy_component_common',
+        # 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:translate_core_common',
         '<(DEPTH)/components/components.gyp:variations',
         '<(DEPTH)/components/components.gyp:version_info',
         '<(DEPTH)/components/components_strings.gyp:components_strings',
         '<(DEPTH)/components/url_formatter/url_formatter.gyp:url_formatter',
         '<(DEPTH)/content/content.gyp:content_common',
         '<(DEPTH)/crypto/crypto.gyp:crypto',
         '<(DEPTH)/net/net.gyp:net',
         '<(DEPTH)/skia/skia.gyp:skia',
         '<(DEPTH)/skia/skia.gyp:skia_library',
@@ skipping 286 matching lines @@
       'sources': [
         'common/resource_usage_reporter.mojom',
       ],
       'dependencies': [
         '../mojo/mojo_base.gyp:mojo_environment_chromium',
         '../third_party/mojo/mojo_public.gyp:mojo_cpp_bindings',
       ],
     },
   ],
 }