Adds the concept of a 'safe mode' hotkey start

chrome/installer/util/google_chrome_distribution.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.
 //
 // This file defines specific implementation of BrowserDistribution class for
 // Google Chrome.
 
 #include "chrome/installer/util/google_chrome_distribution.h"
 
 #include <windows.h>
 #include <msi.h>
+#include <commctrl.h>  // For HOTKEYF constants
 
 #include "base/files/file_path.h"
 #include "base/path_service.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/win/registry.h"
 #include "base/win/windows_version.h"
 #include "chrome/common/net/test_server_locations.h"
 #include "chrome/installer/util/channel_info.h"
@@ skipping 251 matching lines @@
     string16* handler_class_uuid) {
   if (handler_class_uuid)
     *handler_class_uuid = kCommandExecuteImplUuid;
   return true;
 }
 
 bool GoogleChromeDistribution::AppHostIsSupported() {
   return true;
 }
 
+uint32 GoogleChromeDistribution::GetSafeModeHotkey() {
+  // Safe mode shortcut is Ctrl+Shift+F10.
+  return MAKEWORD(VK_F10, HOTKEYF_CONTROL | HOTKEYF_SHIFT);
+}
+
 // This method checks if we need to change "ap" key in Google Update to try
 // full installer as fall back method in case incremental installer fails.
 // - If incremental installer fails we append a magic string ("-full"), if
 // it is not present already, so that Google Update server next time will send
 // full installer to update Chrome on the local machine
 // - If we are currently running full installer, we remove this magic
 // string (if it is present) regardless of whether installer failed or not.
 // There is no fall-back for full installer :)
 void GoogleChromeDistribution::UpdateInstallStatus(bool system_install,
     installer::ArchiveType archive_type,
     installer::InstallStatus install_status) {
   GoogleUpdateSettings::UpdateInstallStatus(system_install,
       archive_type, InstallUtil::GetInstallReturnCode(install_status),
       product_guid());
 }
 
 bool GoogleChromeDistribution::ShouldSetExperimentLabels() {
   return true;
 }
 
 bool GoogleChromeDistribution::HasUserExperiments() {
   return true;
 }