Roll clang 300839:301383.

Roll clang 300839:301383.

BUG=714769

[Nico, 2017-04-28 15:26:06]

The CQ bit was checked by thakis@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-04-28 15:26:28]

Dry run: CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[hans, 2017-04-28 15:38:02]

The CQ bit was checked by hans@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-04-28 15:38:19]

Dry run: CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[hans, 2017-04-28 15:38:25]

Description was changed from

==========
Roll clang 300839:301383.

Ran `tools/clang/scripts/upload_revision.py 301383`.
==========

to

==========
Roll clang 300839:301383.

BUG=714769
==========

[hans, 2017-04-28 16:03:51]

goma :-(

https://build.chromium.org/p/tryserver.blink/builders/linux_trusty_blink_rel/...

GOMA:clang++ compiling ../../v8/src/regexp/regexp-macro-assembler.cc:*ERROR*:
compiler_proxy:251ms: reached max number of active fail fallbacks

[commit-bot: I haz the power, 2017-04-28 19:53:05]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-04-28 19:53:06]

Dry run: Try jobs failed on following builders:
  linux_chromium_chromeos_rel_ng on master.tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)