Use a valid /prefetch argument when launching a process.

chrome/common/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/buildflag_header.gni")
 import("//chrome/common/features.gni")
 import("//chrome/version.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 import("//tools/grit/grit_rule.gni")
 
@@ skipping 193 matching lines @@
 
     public_deps += [
       "//components/printing/common",
       "//printing",
     ]
     if (enable_print_preview) {
       # Full printing support.
       sources += rebase_path(gypi_values.chrome_common_service_process_sources,
                              ".",
                              "//chrome")
+
+      if (is_win) {
+        deps = [
+          # TODO(fdoray): Remove this once the PreRead field trial has expired.
+          # crbug.com/577698
+          "//components/startup_metric_utils/common",
+        ]
+      }
     }
   }
 
   if (is_android) {
     sources -= [
       "channel_info_posix.cc",
       "media_galleries/metadata_types.h",
     ]
   } else {
     # Non-Android.
@@ skipping 161 matching lines @@
     ":constants",
     "//base",
   ]
 }
 
 mojom("mojo_bindings") {
   sources = [
     "resource_usage_reporter.mojom",
   ]
 }