Revert of Roll src/third_party/WebKit 698efc0:7d47c95 (svn 192500:192506) (patchset #1 id:1 of https://codereview.chromium.org/1037703002/)
Revert of Roll src/third_party/WebKit 698efc0:7d47c95 (svn 192500:192506) (patchset #1 id:1 of https://codereview.chromium.org/1037703002/)

Reason for revert:
Broke compilation with GN:

https://build.chromium.org/p/chromium.mac/builders/Mac%20GN%20%28dbg%29/builds/6697/steps/gn/logs/stdio

caused by this Blink commit:
https://chromium.googlesource.com/chromium/blink/+/7d47c95bc49510d29e36fc2895eef3e67706ef41

Original issue's description:
> Roll src/third_party/WebKit 698efc0:7d47c95 (svn 192500:192506)
>
> Summary of changes available at:
> https://chromium.googlesource.com/chromium/blink/+log/698efc0..7d47c95
>
> TBR=jchaffraix@chromium.org
>
> Committed: https://crrev.com/60a49fc315e7eaed780da86aad1eecd40f149f70
> Cr-Commit-Position: refs/heads/master@{#322139}

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

Review URL: https://codereview.chromium.org/1032603004

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#322154}

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