Merge 130691 - Mac Chromium: Ignore system numpad modifier

Merge 130691 - Mac Chromium: Ignore system numpad modifier
https://bugs.webkit.org/show_bug.cgi?id=97161

Patch by Sailesh Agrawal <sail@chromium.org>; on 2012-10-08
Reviewed by Tony Chang.

On Mac, arrow key events have numpad modifier set. This is inconsistent with other platforms.

My fix is to only rely on keycode to decide when to set the numpad modifier.

This code is not exersided by layout tests so I added a new unit test for this.

* WebKit.gypi:
* WebKitUnitTests.gyp:
* src/mac/WebInputEventFactory.mm:
(WebKit::isKeypadEvent): Removed check for numpad modifier.
* tests/WebInputEventFactoryTestMac.mm: Added.
(TEST): Added new test for WebInputEventFactory::keyboardEvent().

TBR=commit-queue@webkit.org
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=130946