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)
@@ -9,6 +9,7 @@
 
 #include <windows.h>
 #include <msi.h>
+#include <commctrl.h>  // For HOTKEYF constants
 
 #include "base/files/file_path.h"
 #include "base/path_service.h"
@@ -280,6 +281,11 @@
   return true;
 }
 
+uint32 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