Adds the concept of a 'safe mode' hotkey start

chrome/installer/util/google_chrome_distribution.h

 // 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 extends generic BrowserDistribution class to declare Google Chrome
 // specific implementation.
 
 #ifndef CHROME_INSTALLER_UTIL_GOOGLE_CHROME_DISTRIBUTION_H_
 #define CHROME_INSTALLER_UTIL_GOOGLE_CHROME_DISTRIBUTION_H_
 
@@ skipping 73 matching lines @@
 
   virtual void UpdateInstallStatus(
       bool system_install,
       installer::ArchiveType archive_type,
       installer::InstallStatus install_status) OVERRIDE;
 
   virtual bool ShouldSetExperimentLabels() OVERRIDE;
 
   virtual bool HasUserExperiments() OVERRIDE;
 
+  virtual int GetSafeModeHotkey() OVERRIDE;
+
   const string16& product_guid() { return product_guid_; }
 
  protected:
   void set_product_guid(const string16& guid) { product_guid_ = guid; }
 
   // Disallow construction from others.
   GoogleChromeDistribution();
 
  private:
   friend class BrowserDistribution;
 
   // The product ID for Google Update.
   string16 product_guid_;
 };
 
 #endif  // CHROME_INSTALLER_UTIL_GOOGLE_CHROME_DISTRIBUTION_H_