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This reverts commit aa1f1cca.

Relanded CL:
  https://chromium-review.googlesource.com/c/chromium/src/+/1341998

Changes from original:
  Initialize has_maskable_primary_icon_

Bug: 904354
Change-Id: I10cbd7bcfea94ea4a1b20236b4e619be9ce415e7

TBR: mgiuca@chromium.org, peter@chromium.org, yfriedman@chromium.org, dominickn@chromium.org
Change-Id: I10cbd7bcfea94ea4a1b20236b4e619be9ce415e7
Reviewed-on: https://chromium-review.googlesource.com/c/1358062Reviewed-by: Peter Conn <peconn@chromium.org>
Commit-Queue: Peter Conn <peconn@chromium.org>
Cr-Commit-Position: refs/heads/master@{#613062}