keydown and keyup events have zero keycode for some numeric pad keys under Chromium on Linux
https://bugs.webkit.org/show_bug.cgi?id=85642

Source/WebCore:

Add missing key mappings for GDK_KP_Begin, GDK_KP_Insert, GDK_KP_Delete and GDK_ISO_Level3_Shift.

Patch by James Weatherall <wez@chromium.org> on 2013-03-03
Reviewed by Adam Barth.

* platform/chromium/KeyCodeConversionGtk.cpp:
(WebCore::windowsKeyCodeForKeyEvent):

Source/WebKit/chromium:

Add tests to verify that the fixed keys generate the same keyCode values as their equivalents.

Patch by James Weatherall <wez@chromium.org> on 2013-03-03
Reviewed by Adam Barth.

* WebKit.gypi:
* tests/KeyCodeConversionTestGtk.cpp: Added.
(WebCore):
(WebCore::TEST):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@144562 268f45cc-cd09-0410-ab3c-d52691b4dbfc