Revert of Roll chromium_revision 496a750d38..70957b2671 (447619:448581) (patchset #1 id:1 of https://codereview.webrtc.org/2683593002/ )
Revert of Roll chromium_revision 496a750d38..70957b2671 (447619:448581) (patchset #1 id:1 of https://codereview.webrtc.org/2683593002/ )

Reason for revert:
Breaks internal projects.

Original issue's description:
> Roll chromium_revision 496a750d38..70957b2671 (447619:448581)
>
> Change log: https://chromium.googlesource.com/chromium/src/+log/496a750d38..70957b2671
> Full diff: https://chromium.googlesource.com/chromium/src/+/496a750d38..70957b2671
>
> Changed dependencies:
> * src/base: https://chromium.googlesource.com/chromium/src/base/+log/32f2a4543f..3a1e5145d5
> * src/build: https://chromium.googlesource.com/chromium/src/build/+log/337c73855e..a5b79d9869
> * src/ios: https://chromium.googlesource.com/chromium/src/ios/+log/6b87d69c72..533d4812cc
> * src/testing: https://chromium.googlesource.com/chromium/src/testing/+log/04c1f97a2d..908af2e604
> * src/third_party: https://chromium.googlesource.com/chromium/src/third_party/+log/c9a58f7ae6..8694363380
> * src/third_party/boringssl/src: https://boringssl.googlesource.com/boringssl.git/+log/358baeb9a4..3f2611a98f
> * src/third_party/catapult: https://chromium.googlesource.com/external/github.com/catapult-project/catapult.git/+log/a801abb6bc..df67b47911
> * src/third_party/gtest-parallel: https://chromium.googlesource.com/external/webrtc/deps/third_party/gtest-parallel/+log/8768563f5c..e281b59a8e
> * src/third_party/libFuzzer/src: https://chromium.googlesource.com/chromium/llvm-project/llvm/lib/Fuzzer.git/+log/78ee52d0c6..64bdf91585
> * src/tools: https://chromium.googlesource.com/chromium/src/tools/+log/d4ba547dba..9491f0f1c7
> DEPS diff: https://chromium.googlesource.com/chromium/src/+/496a750d38..70957b2671/DEPS
>
> No update to Clang.
>
> TBR=
> BUG=None
>
> Review-Url: https://codereview.webrtc.org/2683593002
> Cr-Commit-Position: refs/heads/master@{#16466}
> Committed: https://chromium.googlesource.com/external/webrtc/+/040f5cc5d740df43c3e5ec21f5c5a21e9e695f03

TBR=buildbot@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=None

Review-Url: https://codereview.webrtc.org/2680743003
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#16468}

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