Predator Could not find any possible culprit:

From, Git blame suspecting below changes could be a possible culprit which may have caused this Crash.

Author: reed
Project: chromium
Changelist: https://chromium.googlesource.com/chromium/src/+/dc97d9498faa6f7e040b8556ddd37c8cc2e00c5d
Time: Tue Apr 11 14:33:28 2017
The CL last changed line 45 of file ImageFrameGenerator.cpp, which is stack frame 1. 

Author: Brian Osman
Project: chromium-skia
Changelist: https://skia.googlesource.com/skia.git/+/df7e075c74110fcfebdc49ca503684162e118af5
Time: Wed Apr 26 16:20:28 2017 -0400
The CL last changed line 460 of file SkImage_Lazy.cpp, which is stack frame 4. 

@reed: Assigning to you, request you to please take a look into it. Please help us to find an owner if not with respect to the above changes.

Thanks.!

ClusterFuzz has detected this issue as fixed in range 482055:482069.

Detailed report: https://clusterfuzz.com/testcase?key=4977478589480960

Fuzzer: ochang_domfuzzer
Job Type: linux_tsan_chrome_mp
Platform Id: linux

Crash Type: Data race READ 8
Crash Address: 0x7f4e60d10400
Crash State:
  blink::ImageFrameGenerator::DecodeAndScale
  blink::DecodingImageGenerator::onGetPixels
  SkImageGenerator::getPixels
  
Sanitizer: thread (TSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_tsan_chrome_mp&range=470763:470770
Fixed: https://clusterfuzz.com/revisions?job=linux_tsan_chrome_mp&range=482055:482069

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4977478589480960


See https://dev.chromium.org/Home/chromium-security/bugs/reproducing-clusterfuzz-bugs for more information.

If you suspect that the result above is incorrect, try re-doing that job on the test case report page.

ClusterFuzz testcase 4977478589480960 is verified as fixed, so closing issue.

If this is incorrect, please add ClusterFuzz-Wrong label and re-open the issue.