Adds the concept of a 'safe mode' hotkey start

chrome/installer/util/google_chrome_distribution_dummy.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 dummy implementation of several functions from the
 // BrowserDistribution class for Google Chrome. These functions allow 64-bit
 // Windows Chrome binary to build successfully. Since this binary is only used
 // for Native Client support, most of the install/uninstall functionality is not
 // necessary there.
 
@@ skipping 124 matching lines @@
     string16* handler_class_uuid) {
   NOTREACHED();
   return false;
 }
 
 bool GoogleChromeDistribution::AppHostIsSupported() {
   NOTREACHED();
   return false;
 }
 
+int GoogleChromeDistribution::GetSafeModeHotkey() {
+  return 0;
+}
+
 void GoogleChromeDistribution::UpdateInstallStatus(bool system_install,
     installer::ArchiveType archive_type,
     installer::InstallStatus install_status) {
   NOTREACHED();
 }
 
 bool GoogleChromeDistribution::ShouldSetExperimentLabels() {
   NOTREACHED();
   return false;
 }
 
 bool GoogleChromeDistribution::HasUserExperiments() {
   NOTREACHED();
   return false;
 }