The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/2a7796affc015b6960bbcd5fda123c8dd5e13dbf

commit 2a7796affc015b6960bbcd5fda123c8dd5e13dbf
Author: Finnur Thorarinsson <finnur@chromium.org>
Date: Thu Aug 17 22:58:32 2017

Photo Picker Dialog: Better transition to external intents.

When the Photo Picker launches an intent (e.g. show camera), it often closes
the dialog before the intent has launched, creating a jarring experience for
the user since it looks like the dialog just disappears. It feels broken.

This is an attempt at fixing that by delay dismissing for a bit while the 
intent has a chance to start up.

Bug:  746553 ,  656015 
Change-Id: I55630af151dbef68ca4e3b18c4f5d1f329d4f708
Reviewed-on: https://chromium-review.googlesource.com/613900
Commit-Queue: Finnur Thorarinsson <finnur@chromium.org>
Reviewed-by: Ted Choc <tedchoc@chromium.org>
Cr-Commit-Position: refs/heads/master@{#495366}
[modify] https://crrev.com/2a7796affc015b6960bbcd5fda123c8dd5e13dbf/chrome/android/java/src/org/chromium/chrome/browser/photo_picker/PhotoPickerDialog.java