Adds the concept of a 'safe mode' hotkey start

chrome/installer/setup/install.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/installer/setup/install.h"
 
 #include <windows.h>
 #include <shlobj.h>
 #include <time.h>
 
@@ skipping 439 matching lines @@
   // IMPORTANT: Only the default (no arguments and default browserappid) browser
   // shortcut in the Start menu (Start screen on Win8+) should be made dual
   // mode.
   start_menu_properties.set_dual_mode(true);
   if (!do_not_create_taskbar_shortcut &&
       (shortcut_operation == ShellUtil::SHELL_SHORTCUT_CREATE_ALWAYS ||
        shortcut_operation ==
            ShellUtil::SHELL_SHORTCUT_CREATE_IF_NO_SYSTEM_LEVEL)) {
     start_menu_properties.set_pin_to_taskbar(true);
   }
+  // The 'launch in safe mode' hotkey should be set only for the start menu
+  // shortcut.
+  int hotkey = dist->GetSafeModeHotkey();
+  if (hotkey)
+    start_menu_properties.set_hotkey(hotkey);
   ExecuteAndLogShortcutOperation(ShellUtil::SHORTCUT_LOCATION_START_MENU,
                                  dist, start_menu_properties,
                                  shortcut_operation);
 }
 
 void RegisterChromeOnMachine(const InstallerState& installer_state,
                              const Product& product,
                              bool make_chrome_default) {
   DCHECK(product.is_chrome());
 
@@ skipping 224 matching lines @@
   if (app_host_path.empty())
     return false;
 
   CommandLine cmd(app_host_path);
   cmd.AppendSwitchASCII(::switches::kInstallFromWebstore, app_code);
   VLOG(1) << "App install command: " << cmd.GetCommandLineString();
   return base::LaunchProcess(cmd, base::LaunchOptions(), NULL);
 }
 
 }  // namespace installer