Use a valid /prefetch argument when launching a process.

chrome/installer/util/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/chrome_build.gni")
 import("//testing/test.gni")
 
 # This file deliberately has no default "util" target so dependants have to
 # specify with the ":with_no_strings" or ":with_rc_strings" variants. Random
 # code that ends up getting linked into chrome proper should depend on the
@@ skipping 91 matching lines @@
     ]
 
     deps += [
       # Need to depend on the generated strings target since files here
       # depend on the generated header, but only depend on the ":strings"
       # target (which actually compiles and causes the generated code to be
       # linked) from the ":util" target.
       ":generate_strings",
       "//base/third_party/dynamic_annotations",
       "//components/metrics",
+
+      # TODO(fdoray): Remove this once the PreRead field trial has expired.
+      # crbug.com/577698
+      "//components/startup_metric_utils/common",
       "//courgette:courgette_lib",
       "//crypto",
       "//third_party/bspatch",
       "//third_party/crashpad/crashpad/client",
       "//third_party/icu",
       "//third_party/lzma_sdk",
     ]
 
     configs += [
       "//build/config:precompiled_headers",
@@ skipping 214 matching lines @@
       "//chrome/installer/test:alternate_version_generator_lib",
       "//components/variations",
       "//content/public/common",
       "//testing/gmock",
       "//testing/gtest",
     ]
 
     # TODO(GYP) manifest: $(ProjectDir)\\installer\\mini_installer\\mini_installer.exe.manifest
   }
 }  # is_win