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 74ad0b11100e3bb5eb641329501fd534e70b10a6..8453cb1e1e1bfb34a433fe3feaa14f0c2ab13220 100644
--- a/public/web/WebInputEvent.h
+++ b/public/web/WebInputEvent.h
@@ -237,6 +237,10 @@ public:
     // doesn't hurt to have this one around.
     int nativeKeyCode;
 
+    // The DOM code enum of the key pressed as passed by the embedder. DOM
+    // code enum are defined in ui/events/keycodes/dom4/keycode_converter_data.h.
+    int domCode;

[Mike West, 2015/01/29 11:49:35]

Nit: "domKeyCode"?

[Habib Virji, 2015/01/29 12:24:14]

There are 2 DOM3 Keyboard Event specs,
http://www.w3.org/TR/DOM-Level-3-Events-code/ and
http://www.w3.org/TR/DOM-Level-3-Events-key/. Perhaps, when DOM3-Event-Key it
will be named domKey. Then it will become bit difficult to differentiate between
these two. 

+
     // 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