Reason for revert:
Breaks tsan build generation:
https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20TSAN/builds/11441

Original issue's description:
> Update V8 DEPS.
>
> Rolling v8/build to 52f474cdb9e67007b938fd4a47220cb3c012e5e8
>
> Rolling v8/third_party/WebKit/Source/platform/inspector_protocol to 84d90b2cc3f01a39bf73a8119a5cec0337d00c9f
>
> Rolling v8/tools/clang to 3e1948978834c16073c1b076410df1a80adda1f5
>
> Rolling v8/tools/mb to ac239cc82ef08858d6f2b75216dd13afcdbc6ac3
>
> TBR=machenbach@chromium.org,vogelheim@chromium.org,hablich@chromium.org
>
> Committed: https://crrev.com/3b8a2e5129fec64674bb0191cba5aa4592d08d5f
> Cr-Commit-Position: refs/heads/master@{#38995}

TBR=hablich@chromium.org,vogelheim@chromium.org,v8-autoroll@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review-Url: https://codereview.chromium.org/2290163002
Cr-Commit-Position: refs/heads/master@{#38998}