Adds the concept of a 'safe mode' hotkey start

chrome/installer/util/google_chrome_distribution.cc

Index: chrome/installer/util/google_chrome_distribution.cc
===================================================================
--- chrome/installer/util/google_chrome_distribution.cc	(revision 232633)
+++ chrome/installer/util/google_chrome_distribution.cc	(working copy)
@@ -280,6 +280,11 @@
   return true;
 }
 
+int 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