Adding support for DOM3 KeyboardEvents Code in KeyboardEvents

public/web/WebInputEvent.h

Index: public/web/WebInputEvent.h
diff --git a/public/web/WebInputEvent.h b/public/web/WebInputEvent.h
index 9f4722a2053b6261cdfb42e59823436c0ac1dd5e..c31c1bbbed7f2a13fd2baeb59478b5ae1107943e 100644
--- a/public/web/WebInputEvent.h
+++ b/public/web/WebInputEvent.h
@@ -246,6 +246,11 @@ public:
     // doesn't hurt to have this one around.
     int nativeKeyCode;
 
+    // The usbCode for the key generated. USB code is then used to map to
+    // code as per DOM3 Keyboard Code Specifications.
+    // This code however is not used for testing, it relies on windowsKeyCode.
+    int usbCode;
+
     // This identifies whether this event was tagged by the system as being
     // a "system key" event (see
     // http://msdn.microsoft.com/en-us/library/ms646286(VS.85).aspx for