The following revision refers to this bug:
  https://pdfium.googlesource.com/pdfium/+/393f8994d2aa1a9c66fd69eaf1c9418ae2bb92ee

commit 393f8994d2aa1a9c66fd69eaf1c9418ae2bb92ee
Author: Dan Sinclair <dsinclair@chromium.org>
Date: Thu Nov 30 15:46:51 2017

Run clang-tidy modernize-use-bool-literals on //third_party/pdfium

See the bugs and cxx post for justification and details:
https://groups.google.com/a/chromium.org/forum/#!topic/cxx/RkOHzIK6Tq8

This change was done using clang-tidy as described here:
https://chromium.googlesource.com/chromium/src/+/lkcr/docs/clang_tidy.md

Bug: chromium:778955
Change-Id: Ib037ed749539e4380fb336fc6fa85648fc506118
Reviewed-on: https://pdfium-review.googlesource.com/19990
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>

[modify] https://crrev.com/393f8994d2aa1a9c66fd69eaf1c9418ae2bb92ee/third_party/base/numerics/safe_conversions_impl.h

This issue has been Available for over a year. If it's no longer important or seems unlikely to be fixed, please consider closing it out. If it is important, please re-triage the issue.

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