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This is a lexical change to be consistent with the naming for the
other App entities which follow the pattern App*.

Bug: 1060807
Change-Id: I94e2d5748c56b38f380078c831c453361150713d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2274589Reviewed-by: Joshua Pawlicki <waffles@chromium.org>
Commit-Queue: Sorin Jianu <sorin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#783743}