Revert of Roll src/third_party/WebKit 4b9569f:fa53a39 (svn 189384:189535)

Revert of Roll src/third_party/WebKit 4b9569f:fa53a39 (svn 189384:189535) (patchset #1 id:1 of https://codereview.chromium.org/901853002/)

Reason for revert:
Broke Mac GN builds

Original issue's description:
> Roll src/third_party/WebKit 4b9569f:fa53a39 (svn 189384:189535)
>
> Summary of changes available at:
> https://chromium.googlesource.com/chromium/blink/+log/4b9569f..fa53a39
>
> TBR=dcheng@chromium.org,apavlov@chromium.org
>
> Committed: https://crrev.com/e4b735f7acc2ae3ae1c891470f2a703fe8608724
> Cr-Commit-Position: refs/heads/master@{#314785}

TBR=dcheng@chromium.org,blink-deps-roller@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://crrev.com/4cb9b8c961e5dcc4a52ec37dcce99617fee2854f
Cr-Commit-Position: refs/heads/master@{#314789}

[apavlov, 2015-02-05 11:15:19]

Created Revert of Roll src/third_party/WebKit 4b9569f:fa53a39 (svn
189384:189535)

[commit-bot: I haz the power, 2015-02-05 11:15:36]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/881083003/1

[commit-bot: I haz the power, 2015-02-05 11:16:30]

Committed patchset #1 (id:1)

[Noel Gordon, 2015-02-05 11:16:37]

LGTM

[commit-bot: I haz the power, 2015-02-05 11:17:16]

Patchset 1 (id:??) landed as
https://crrev.com/4cb9b8c961e5dcc4a52ec37dcce99617fee2854f
Cr-Commit-Position: refs/heads/master@{#314789}