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

chrome/browser/chrome_content_browser_client.cc

 // 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.
 
 #include "chrome/browser/chrome_content_browser_client.h"
 
 #include <map>
 #include <set>
 #include <utility>
 #include <vector>
@@ skipping 163 matching lines @@
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/resources/grit/ui_resources.h"
 #include "url/gurl.h"
 #include "url/origin.h"
 
 #if defined(OS_WIN)
 #include "base/strings/string_tokenizer.h"
 #include "base/win/windows_version.h"
 #include "chrome/browser/chrome_browser_main_win.h"
-#include "components/startup_metric_utils/common/pre_read_field_trial_utils_win.h"
 #include "sandbox/win/src/sandbox_policy.h"
 #elif defined(OS_MACOSX)
 #include "chrome/browser/chrome_browser_main_mac.h"
 #elif defined(OS_CHROMEOS)
 #include "chrome/browser/chromeos/attestation/platform_verification_impl.h"
 #include "chrome/browser/chromeos/chrome_browser_main_chromeos.h"
 #include "chrome/browser/chromeos/drive/fileapi/file_system_backend_delegate.h"
 #include "chrome/browser/chromeos/file_manager/app_id.h"
 #include "chrome/browser/chromeos/file_system_provider/fileapi/backend_delegate.h"
 #include "chrome/browser/chromeos/fileapi/file_system_backend.h"
@@ skipping 2514 matching lines @@
 
   base::StringTokenizer tokenizer(mime_types, ",");
   tokenizer.set_quote_chars("\"");
   while (tokenizer.GetNext()) {
     if (tokenizer.token() == mime_type)
       return true;
   }
 
   return false;
 }
-
-bool ChromeContentBrowserClient::ShouldUseWindowsPrefetchArgument() const {
-  return startup_metric_utils::GetPreReadOptions().use_prefetch_argument;
-}
 #endif  // defined(OS_WIN)
 
 void ChromeContentBrowserClient::RegisterRenderProcessMojoServices(
     content::ServiceRegistry* registry,
     content::RenderProcessHost* render_process_host) {
   registry->AddService(
       base::Bind(&startup_metric_utils::StartupMetricHostImpl::Create));
 }
 
 void ChromeContentBrowserClient::RegisterFrameMojoShellServices(
@@ skipping 231 matching lines @@
   if (channel <= kMaxDisableEncryptionChannel) {
     static const char* const kWebRtcDevSwitchNames[] = {
       switches::kDisableWebRtcEncryption,
     };
     to_command_line->CopySwitchesFrom(from_command_line,
                                       kWebRtcDevSwitchNames,
                                       arraysize(kWebRtcDevSwitchNames));
   }
 }
 #endif  // defined(ENABLE_WEBRTC)