Automatically applying components based on crash stacktrace and information from OWNERS files.

If this is incorrect, please apply the Test-Predator-Wrong-Components label.

Automatically assigning owner based on suspected regression changelist https://chromium.googlesource.com/chromium/src/+/91155378db70515df1dda8c650237a38549b93fa (HTMLDocumentParser: Remove TokenizedChunkQueue).

If this is incorrect, please let us know why and apply the Test-Predator-Wrong-CLs label. If you aren't the correct owner for this issue, please unassign yourself as soon as possible so it can be re-triaged.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/9f63db45c1a5bf808e12b2c5a4228b57b9f9f434

commit 9f63db45c1a5bf808e12b2c5a4228b57b9f9f434
Author: Kouhei Ueno <kouhei@chromium.org>
Date: Tue May 01 06:58:48 2018

Re-introduce nullchk before calling EnqueueTokenizedChunk

This CL reintroduces null check of WeakPtr parser_ which was
accidentally removed in 91155378db70515df1dda8c650237a38549b93fa

I have manually tested that this fixes the clusterfuzz test cases.
To be confirmed via clusterfuzz bots.

Bug: 837948,  837893 ,  837693 , 689702
Change-Id: I8f149803e24fb949a36fbeee96f17f80a62f6ea0
Reviewed-on: https://chromium-review.googlesource.com/1036885
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Kouhei Ueno <kouhei@chromium.org>
Cr-Commit-Position: refs/heads/master@{#555012}
[modify] https://crrev.com/9f63db45c1a5bf808e12b2c5a4228b57b9f9f434/third_party/blink/renderer/core/html/parser/background_html_parser.cc

ClusterFuzz has detected this issue as fixed in range 555003:555014.

Detailed report: https://clusterfuzz.com/testcase?key=4997928176058368

Fuzzer: mbarbella_js_mutation_layout
Job Type: linux_cfi_chrome
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000008
Crash State:
  chrome
  blink::HTMLDocumentParser::EnqueueTokenizedChunk
  blink::BackgroundHTMLParser::EnqueueTokenizedChunk
  
Sanitizer: cfi (CFI)

Regressed: https://clusterfuzz.com/revisions?job=linux_cfi_chrome&range=554303:554322
Fixed: https://clusterfuzz.com/revisions?job=linux_cfi_chrome&range=555003:555014

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4997928176058368

See https://github.com/google/clusterfuzz-tools for more information.

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