Revert of Support for :enabled selector on Anchor & Area elements

Revert of Support for :enabled selector on Anchor & Area elements (patchset #2 id:20001 of https://codereview.chromium.org/408293002/)

Reason for revert:
HTML spec has been modified [1] to disable support for :enabled CSS selector on Anchor, Area & Link elements, after discussion on W3C Bugzilla [2].

[1] https://html5.org/r/8818
[2] https://www.w3.org/Bugs/Public/show_bug.cgi?id=26622

Original issue's description:
> Support for :enabled selector on Anchor & Area elements
> 
> Updates the PseudoEnabled selector checker to check for Anchor & Area
> elements with a link. Reverts ef7563d45ca529252c4caa612dece0ddb1dcfc1d
> which removed relevant Shadow DOM tests.
> 
> Spec: http://html.spec.whatwg.org/#selector-enabled
> 
> BUG=393105
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=179427

TBR=esprehn@chromium.org,alexis.menard@intel.com,dglazkov@chromium.org,jchaffraix@chromium.org
BUG=393105
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=182932

[abinader, 2014-09-26 18:43:40]

Created Revert of Support for :enabled selector on Anchor & Area elements

[rune, 2014-09-26 19:12:42]

rune@opera.com changed reviewers:
+ rune@opera.com

[rune, 2014-09-26 19:12:43]

You should remove these two lines too:

https://code.google.com/p/chromium/codesearch#chromium/src/third_party/WebKit...

[abinader, 2014-09-26 20:28:52]

On 2014/09/26 19:12:43, rune wrote:
> You should remove these two lines too:
> 
>
https://code.google.com/p/chromium/codesearch#chromium/src/third_party/WebKit...

Good catch, will upload a new patch w/ these.

[rune, 2014-09-29 20:36:50]

On 2014/09/26 at 20:28:52, bruno.d wrote:
> On 2014/09/26 19:12:43, rune wrote:
> > You should remove these two lines too:
> > 
> >
https://code.google.com/p/chromium/codesearch#chromium/src/third_party/WebKit...
> 
> Good catch, will upload a new patch w/ these.

lgtm, but I think you should drop TBR, NOTREECHECKS, NOTRY to test this revert
properly.

[abinader, 2014-09-30 12:38:34]

On 2014/09/29 20:36:50, rune wrote:
> On 2014/09/26 at 20:28:52, bruno.d wrote:
> > On 2014/09/26 19:12:43, rune wrote:
> > > You should remove these two lines too:
> > > 
> > >
>
https://code.google.com/p/chromium/codesearch#chromium/src/third_party/WebKit...
> > 
> > Good catch, will upload a new patch w/ these.
> 
> lgtm, but I think you should drop TBR, NOTREECHECKS, NOTRY to test this revert
> properly.

OK, these were automagically added by Codereview when I clicked the "Revert
Patchset". Removing NOTREECHECKS and NOTRY, but keeping TBR as it doesn't affect
the test results.

[abinader, 2014-09-30 15:19:19]

The CQ bit was checked by bruno.d@partner.samsung.com

[commit-bot: I haz the power, 2014-09-30 15:20:03]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/610683002/170001

[commit-bot: I haz the power, 2014-09-30 15:53:35]

Committed patchset #3 (id:170001) as 182932