Fix cancel on touch outside in AppModalPresenter

TBR=twellington@chromium.org

Bug: 924877
Change-Id: Iacc7dbca1c2166cc9219ebaa4153ab0e52546053
Reviewed-on: https://chromium-review.googlesource.com/c/1435494
Reviewed-by: Theresa <twellington@chromium.org>
Commit-Queue: Becky Zhou <huayinz@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#626143}(cherry picked from commit ef448d714c00d5f3169ba90f0baf557fd86cb345)
Reviewed-on: https://chromium-review.googlesource.com/c/1447692
Reviewed-by: Becky Zhou <huayinz@chromium.org>
Cr-Commit-Position: refs/branch-heads/3683@{#86}
Cr-Branched-From: e51029943e0a38dd794b73caaf6373d5496ae783-refs/heads/master@{#625896}
1 file changed