Revert of Switch Chrome on Linux to libc++ (patchset #5 id:180001 of https://codereview.chromium.org/2933573002/ )

Reason for revert:
Breaks https://build.chromium.org/p/chromium.gpu.fyi/builders/GPU%20Linux%20Builder/builds/92009

Original issue's description:
> Switch Chrome on Linux to libc++
>
> Design doc detailing the changes at [1], and announcement to
> chromium-dev at [2].
>
> In addition, this CL updates perf_expectations to increase the number
> of allowed static initializers.  libc++ adds some initializers from
> iostream.cpp.  However, this case is net-neutral since the initializer
> used to live in libstdc++, but has been pushed into the chrome and
> nacl executables.  The perf_expectations change also required adding
> NOPRESUBMIT=true to silence a bogus warning.
>
> [1] https://docs.google.com/document/d/1zmHUXlpGNXB433wHnr40dLwj7c-USsIVlyAeH7vOI9o/edit#heading=h.bfky2xssferh
> [2] https://groups.google.com/a/chromium.org/forum/?fromgroups#!topic/chromium-dev/z2YnFCxq0MA
>
> BUG=593874
> R=thakis@chromium.org
> TBR=rdevlin.cronin@chromium.org
> CC=thestig@chromium.org
> NOPRESUBMIT=true
> CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_chromium_dbg_ng;master.tryserver.chromium.linux:linux_arm;master.tryserver.chromium.linux:linux_chromium_archive_rel_ng;master.tryserver.chromium.linux:linux_chromium_dbg_32_ng
>
> Review-Url: https://codereview.chromium.org/2933573002
> Cr-Commit-Position: refs/heads/master@{#483498}
> Committed: https://chromium.googlesource.com/chromium/src/+/39fcd6af4d8c9ddcf909b8d489c6ba684d046157

TBR=thakis@chromium.org,rdevlin.cronin@chromium.org,thomasanderson@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=593874

Review-Url: https://codereview.chromium.org/2965693002
Cr-Commit-Position: refs/heads/master@{#483560}
8 files changed