Use a valid /prefetch argument when launching a process.

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 149 matching lines @@
 #include "net/ssl/ssl_cert_request_info.h"
 #include "ppapi/host/ppapi_host.h"
 #include "storage/browser/fileapi/external_mount_points.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/resources/grit/ui_resources.h"
 
 #if defined(OS_WIN)
 #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 2449 matching lines @@
   if (result != sandbox::SBOX_ALL_OK)
     return false;
 
   // Renderers need to send named pipe handles and shared memory
   // segment handles to NaCl loader processes.
   result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_HANDLES,
                            sandbox::TargetPolicy::HANDLES_DUP_ANY,
                            L"File");
   return result == sandbox::SBOX_ALL_OK;
 }
+
+bool ChromeContentBrowserClient::ShouldUseWindowsPrefetchArgument() const {
+  return startup_metric_utils::GetPreReadOptions().prefetch_argument;
+}
 #endif
 
 void ChromeContentBrowserClient::RegisterFrameMojoShellServices(
     content::ServiceRegistry* registry,
     content::RenderFrameHost* render_frame_host) {
 #if defined(OS_CHROMEOS)
   registry->AddService(
       base::Bind(&chromeos::attestation::PlatformVerificationImpl::Create,
                  render_frame_host));
 #endif
@@ skipping 175 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)