All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=614852

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgrOGnoQsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg7MyMvgoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgrJy1vwsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg7KibsQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgrJKU4AgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgrKrtuwkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgrLiluAkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgrOqTqQkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgzIfi5ggM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgrNKGogsM


Bot(s) for this bug's original alert(s):

chromium-rel-win10
chromium-rel-win7-dual
chromium-rel-win7-gpu-ati
chromium-rel-win7-gpu-intel
chromium-rel-win7-gpu-nvidia
chromium-rel-win7-x64-dual

Based on bisect results, suspecting this change was responsible:

commit	4d0d91ff393599cb9e605b10b09eb59983145cd4	
author	kotenkov <kotenkov@yandex-team.ru>	Tue May 24 17:24:49 2016
committer	Commit bot <commit-bot@chromium.org>	Tue May 24 17:25:56 2016
Replace all occurrences of RELEASE_ASSERT in wtf with CHECK.

It looks like that CHECK => RELEASE_ASSERT still causes some regression.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/90ab609c3dcf497cb08af396f552ca1c8c56e10a

commit 90ab609c3dcf497cb08af396f552ca1c8c56e10a
Author: kotenkov <kotenkov@yandex-team.ru>
Date: Fri May 27 11:46:46 2016

Revert of Replace all occurrences of RELEASE_ASSERT in wtf with CHECK. (patchset #3 id:40001 of https://codereview.chromium.org/1992873004/ )

Reason for revert:
12.5%-56.9% regression in blink_perf.layout at 395611:395672

Original issue's description:
> Replace all occurrences of RELEASE_ASSERT in wtf with CHECK.
>
> This is a reland of https://codereview.chromium.org/1840163002.
>
> Performance regressions were addressed in
> https://codereview.chromium.org/1937613002
> and https://codereview.chromium.org/1840163002.
>
> BUG= 596760 , 599867 
>
> Committed: https://crrev.com/4d0d91ff393599cb9e605b10b09eb59983145cd4
> Cr-Commit-Position: refs/heads/master@{#395624}

TBR=haraken@chromium.org,yutak@chromium.org,tkent@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG= 596760 , 599867 , 614852 

Review-Url: https://codereview.chromium.org/2016223002
Cr-Commit-Position: refs/heads/master@{#396441}

[modify] https://crrev.com/90ab609c3dcf497cb08af396f552ca1c8c56e10a/third_party/WebKit/Source/wtf/Deque.h
[modify] https://crrev.com/90ab609c3dcf497cb08af396f552ca1c8c56e10a/third_party/WebKit/Source/wtf/Functional.h
[modify] https://crrev.com/90ab609c3dcf497cb08af396f552ca1c8c56e10a/third_party/WebKit/Source/wtf/HashTable.h
[modify] https://crrev.com/90ab609c3dcf497cb08af396f552ca1c8c56e10a/third_party/WebKit/Source/wtf/TerminatedArrayBuilder.h
[modify] https://crrev.com/90ab609c3dcf497cb08af396f552ca1c8c56e10a/third_party/WebKit/Source/wtf/Vector.h
[modify] https://crrev.com/90ab609c3dcf497cb08af396f552ca1c8c56e10a/third_party/WebKit/Source/wtf/WTF.cpp
[modify] https://crrev.com/90ab609c3dcf497cb08af396f552ca1c8c56e10a/third_party/WebKit/Source/wtf/allocator/PageAllocator.cpp
[modify] https://crrev.com/90ab609c3dcf497cb08af396f552ca1c8c56e10a/third_party/WebKit/Source/wtf/allocator/PartitionAlloc.cpp
[modify] https://crrev.com/90ab609c3dcf497cb08af396f552ca1c8c56e10a/third_party/WebKit/Source/wtf/allocator/PartitionAlloc.h
[modify] https://crrev.com/90ab609c3dcf497cb08af396f552ca1c8c56e10a/third_party/WebKit/Source/wtf/allocator/PartitionAllocator.h
[modify] https://crrev.com/90ab609c3dcf497cb08af396f552ca1c8c56e10a/third_party/WebKit/Source/wtf/allocator/Partitions.cpp
[modify] https://crrev.com/90ab609c3dcf497cb08af396f552ca1c8c56e10a/third_party/WebKit/Source/wtf/dtoa/utils.h
[modify] https://crrev.com/90ab609c3dcf497cb08af396f552ca1c8c56e10a/third_party/WebKit/Source/wtf/text/AtomicString.cpp
[modify] https://crrev.com/90ab609c3dcf497cb08af396f552ca1c8c56e10a/third_party/WebKit/Source/wtf/text/CString.cpp
[modify] https://crrev.com/90ab609c3dcf497cb08af396f552ca1c8c56e10a/third_party/WebKit/Source/wtf/text/StringConcatenate.cpp
[modify] https://crrev.com/90ab609c3dcf497cb08af396f552ca1c8c56e10a/third_party/WebKit/Source/wtf/text/StringConcatenate.h
[modify] https://crrev.com/90ab609c3dcf497cb08af396f552ca1c8c56e10a/third_party/WebKit/Source/wtf/text/StringImpl.cpp
[modify] https://crrev.com/90ab609c3dcf497cb08af396f552ca1c8c56e10a/third_party/WebKit/Source/wtf/text/StringImpl.h
[modify] https://crrev.com/90ab609c3dcf497cb08af396f552ca1c8c56e10a/third_party/WebKit/Source/wtf/text/TextCodecUTF16.cpp
[modify] https://crrev.com/90ab609c3dcf497cb08af396f552ca1c8c56e10a/third_party/WebKit/Source/wtf/text/WTFString.cpp
[modify] https://crrev.com/90ab609c3dcf497cb08af396f552ca1c8c56e10a/third_party/WebKit/Source/wtf/typed_arrays/ArrayBuffer.h
[modify] https://crrev.com/90ab609c3dcf497cb08af396f552ca1c8c56e10a/third_party/WebKit/Source/wtf/typed_arrays/TypedArrayBase.h

On Windows only it looks like though.

https://codereview.chromium.org/1992873004/#msg20

Renaming Blink>WTF to Blink>Internals>WTF.

These metrics have recovered.