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This CL removes uses of:
  DOMArrayBufferBase::DeprecatedByteLengthAsUnsigned
  DOMArrayBufferView::deprecatedByteLengthAsUnsigned

Because TypeConverters cannot signal failure, another layer of maximum
size checking under penalty of DOMExceptions needed to be added in
credentials_container.cc.

Bug: 1030717
Change-Id: I91598413d0762ffc5fa09d1cd19d79e2a5ce72de
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2213526
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Will Harris <wfh@chromium.org>
Reviewed-by: Balazs Engedy <engedy@chromium.org>
Reviewed-by: Martin Kreichgauer <martinkr@google.com>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#826166}