Findit did not find any Suspected Cls.
From code search on the crashed file 'WebLocalFrameImpl.cpp' which is stack frame 1 & 2, suspecting the below.
haraken@ : Could you please take a look into this if its related to your change, else feel free to re-assign to an appropriate dev person.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/5723b5345281cbc8d3cbe7d4715003a2ee206edd

commit 5723b5345281cbc8d3cbe7d4715003a2ee206edd
Author: sigbjornf <sigbjornf@opera.com>
Date: Thu Apr 07 13:14:21 2016

Avoid setIndexedDBClientCreateFunction() write race.

R=haraken
BUG= 599011 

Review URL: https://codereview.chromium.org/1862403002

Cr-Commit-Position: refs/heads/master@{#385733}

[modify] https://crrev.com/5723b5345281cbc8d3cbe7d4715003a2ee206edd/third_party/WebKit/Source/modules/indexeddb/IndexedDBClient.cpp

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/4fa5dd8ee1e6f6c8719935152f3b48f82626d595

commit 4fa5dd8ee1e6f6c8719935152f3b48f82626d595
Author: sigbjornf <sigbjornf@opera.com>
Date: Fri Apr 08 05:55:16 2016

Add setIndexedDBClientCreateFunction() explanatory comment.

Follow up changes in r385772 and r385733 with a comment to
try to explain why update atomicity matters here.

R=
BUG= 598551 ,  599011 
NOTRY=true

Review URL: https://codereview.chromium.org/1862223005

Cr-Commit-Position: refs/heads/master@{#386000}

[modify] https://crrev.com/4fa5dd8ee1e6f6c8719935152f3b48f82626d595/third_party/WebKit/Source/modules/indexeddb/IndexedDBClient.cpp

ClusterFuzz has detected this issue as fixed in range 385751:385831.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=5040361197535232

Fuzzer: inferno_layout_test_unmodified
Job Type: linux_tsan_chrome_mp
Platform Id: linux

Crash Type: Data race WRITE 8
Crash Address: 0x7f4f7a385498
Crash State:
  blink::setIndexedDBClientCreateFunction
  blink::WebLocalFrameImpl::WebLocalFrameImpl
  blink::WebLocalFrame::create
  
Fixed: https://cluster-fuzz.appspot.com/revisions?job=linux_tsan_chrome_mp&range=385751:385831

Unminimized Testcase: https://cluster-fuzz.appspot.com/download/AMIfv95xm2ohM1soLlNSICNX3YkZ4u8T7NZNYtx0wffhV-Ui0X2-ayaXhRVoIMKpui5wXWzPiFPhRvL_znUwwblPgBLSmTh279wQND7Hm2b3nSh8Y2RQ-Zni69QuqWPER57mDpmHWk263uUyW47Gf-UUr7W6Ppz9_Q


Additional requirements: Requires HTTP

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