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/+/5b9a9a6f8c9c646ac542a9e1a2f18c59140849e6 (Check if the next text node has a leading white space).

If this is incorrect, please remove the owner and apply the Test-Predator-Wrong-CLs label.

Lower to Pri-3 since real world usage of InsertParagraphSeparator with unusual HTML is low.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/de7b67f8a7810e6170d6a80ba01109791ca36915

commit de7b67f8a7810e6170d6a80ba01109791ca36915
Author: tanvir.rizvi <tanvir.rizvi@samsung.com>
Date: Wed Dec 06 06:04:47 2017

[Clusterfuzz] crash in InsertParagraphSeperator

InsertParagraphSeperator gets DCHECK(IsEditablePosition)
when checking for leading white speace position.
This happens on a unusual HTML having,
webkit-appearance style applied.

Since the layoutBlock in this scenario has a
logical height because of appearance property,
and layout for table elements like colgroup is
LayoutBlockFlow, therefore the visuallyEquivalentAlgorithm
considers it as a EditablePosition,
and the command for InsertParagraph is executed.

Bug:  777378 
Change-Id: I2abce4d09e2526f081cd810fc663aec61cfb24bf
Reviewed-on: https://chromium-review.googlesource.com/781331
Reviewed-by: yosin (OOO Dec 11 to Jan 8) <yosin@chromium.org>
Reviewed-by: Yoichi Osato <yoichio@chromium.org>
Commit-Queue: Tanvir Rizvi <tanvir.rizvi@samsung.com>
Cr-Commit-Position: refs/heads/master@{#522023}
[modify] https://crrev.com/de7b67f8a7810e6170d6a80ba01109791ca36915/third_party/WebKit/Source/core/editing/BUILD.gn
[modify] https://crrev.com/de7b67f8a7810e6170d6a80ba01109791ca36915/third_party/WebKit/Source/core/editing/commands/InsertParagraphSeparatorCommand.cpp
[modify] https://crrev.com/de7b67f8a7810e6170d6a80ba01109791ca36915/third_party/WebKit/Source/core/editing/commands/InsertParagraphSeparatorCommand.h
[add] https://crrev.com/de7b67f8a7810e6170d6a80ba01109791ca36915/third_party/WebKit/Source/core/editing/commands/InsertParagraphSeparatorCommandTest.cpp

ClusterFuzz has detected this issue as fixed in range 521421:521451.

Detailed report: https://clusterfuzz.com/testcase?key=6591482592231424

Fuzzer: inferno_layout_test_unmodified
Job Type: windows_asan_chrome
Platform Id: windows

Crash Type: Null-dereference
Crash Address: 0x00000008
Crash State:
  blink::InsertParagraphSeparatorCommand::DoApply
  blink::CompositeEditCommand::ApplyCommandToComposite
  blink::TypingCommand::InsertParagraphSeparator
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=windows_asan_chrome&range=449250:449259
Fixed: https://clusterfuzz.com/revisions?job=windows_asan_chrome&range=521421:521451

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6591482592231424

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.

ClusterFuzz testcase 6591482592231424 is verified as fixed, so closing issue as verified.

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