Reland of Disable failing blink_style.key_mobile_sites

Reland of Disable failing blink_style.key_mobile_sites (patchset #1 id:1 of https://codereview.chromium.org/2768683005/ )

Reason for revert:
The tests are still failing in the same way.

Original issue's description:
> Revert of Disable failing blink_style.key_mobile_sites (patchset #1 id:1 of https://codereview.chromium.org/2758533003/ )
> 
> Reason for revert:
> Root cause should be fixed.
> 
> Original issue's description:
> > Disable failing blink_style.key_mobile_sites
> > 
> > BUG=702194
> > 
> > Review-Url: https://codereview.chromium.org/2758533003
> > Cr-Commit-Position: refs/heads/master@{#457432}
> > Committed: https://chromium.googlesource.com/chromium/src/+/4d954851ba9c129b4529302f77862f6b812165d8
> 
> TBR=sullivan@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=702194
> 
> Review-Url: https://codereview.chromium.org/2768683005
> Cr-Commit-Position: refs/heads/master@{#458730}
> Committed: https://chromium.googlesource.com/chromium/src/+/c4928c8fba4766c4fb25cbb0ecce574101b29aca

TBR=sullivan@chromium.org,nednguyen@google.com
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=702194

[rnephew (Reviews Here), 2017-03-28 21:33:37]

The CQ bit was checked by rnephew@chromium.org

[rnephew (Reviews Here), 2017-03-28 21:33:37]

Created Reland of Disable failing blink_style.key_mobile_sites

[commit-bot: I haz the power, 2017-03-28 21:34:24]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[rnephew (Reviews Here), 2017-03-28 22:00:50]

The CQ bit was unchecked by rnephew@chromium.org

[rnephew (Reviews Here), 2017-03-28 22:01:10]

On 2017/03/28 21:34:24, commit-bot: I haz the power wrote:
> CQ is trying da patch. Follow status at
>  
>
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

Reverted wrong cl, this one only does blink_style, I need the one that disables
the other benchmarks as well.

[rnephew (Reviews Here), 2017-03-28 22:02:25]

On 2017/03/28 22:01:10, rnephew (Reviews Here) wrote:
> On 2017/03/28 21:34:24, commit-bot: I haz the power wrote:
> > CQ is trying da patch. Follow status at
> >  
> >
>
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...
> 
> Reverted wrong cl, this one only does blink_style, I need the one that
disables
> the other benchmarks as well.

Actually, there are 2 different CLs that need to be reverted. I'm going to just
make a new one that merges those two so we only have to deal with one CL when
this is fixed.