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This is achieved by setting an extension in it AppLaunchParams.

Bug: 813699
Change-Id: Id519c61a8974ba7aa69b982d9c594b71828425c2
Reviewed-on: https://chromium-review.googlesource.com/1009513Reviewed-by: Ben Wells <benwells@chromium.org>
Commit-Queue: Nicholas Verne <nverne@chromium.org>
Cr-Commit-Position: refs/heads/master@{#550112}