[CSS Grid Layout] Remove legacy WebKitCSSGridLayoutEnabled flag from the Layout Tests.

[CSS Grid Layout] Remove legacy WebKitCSSGridLayoutEnabled 
flag from the Layout Tests.

Most of the layout tests come form WebKit codebase before
the fork, so they still have many legacy and unneeded bits.

This patch removes the WebKitCSSGridLayoutEnabled flag 
setting by the testRunner.

BUG=79180
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=168832

[esprehn, 2014-03-10 00:57:56]

The only thing I see this removing is calls to
testRunner.overridePreference("WebKitCSSGridLayoutEnabled", 1);

are there any other "bits" you removed? If not can you make the description more
explicit?

lgtm

[jfernandez, 2014-03-10 10:54:49]

On 2014/03/10 00:57:56, esprehn wrote:
> The only thing I see this removing is calls to
> testRunner.overridePreference("WebKitCSSGridLayoutEnabled", 1);
> 
> are there any other "bits" you removed? If not can you make the description
more
> explicit?
> 
> lgtm

It's just the WebKitCSSGridLayoutEnabled. I've modified the description
accordingly.
Thanks.

[jfernandez, 2014-03-10 10:54:57]

The CQ bit was checked by jfernandez@igalia.com

[commit-bot: I haz the power, 2014-03-10 10:55:17]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/jfernandez@igalia.com/180523004/20001

[commit-bot: I haz the power, 2014-03-10 11:58:41]

Change committed as 168832