Adds the concept of a 'safe mode' hotkey start

chrome/installer/setup/install.cc

Index: chrome/installer/setup/install.cc
===================================================================
--- chrome/installer/setup/install.cc	(revision 232633)
+++ chrome/installer/setup/install.cc	(working copy)
@@ -457,6 +457,11 @@
            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);