KeyboardEvent.location should be DOM_KEY_LOCATION_STANDARD for Num Lock key

Source/testing/runner/KeyCodeMapping.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 216 matching lines @@
     case VKEY_RSHIFT:
         return 62;
     case VKEY_LCONTROL:
         return 37;
     case VKEY_RCONTROL:
         return 105;
     case VKEY_LMENU:
         return 64;
     case VKEY_RMENU:
         return 108;
+    case VKEY_NUMLOCK:
+        return 77;
 
     default:
         return 0;
     }
 #else
     return keysym - keysym;
 #endif
 }
 
 }