Issue 784198  has been merged into this issue.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/4496af48f345a546bced08eb2ba80f06bd23350a

commit 4496af48f345a546bced08eb2ba80f06bd23350a
Author: Ran Ji <ranj@chromium.org>
Date: Thu Nov 23 19:19:53 2017

Redirect back to Webapk from CCT within scope if the CCT previous opened by the Webapk

Previously package name is not set in the tab for webapk. Set webapk package name
when creating tab in CCT so the navigation can be handled by existing logic for native app.

Bug:  785404 
Change-Id: I9244b62f6f8f9bd74860e61c37ec6759b2d7e4e1
Reviewed-on: https://chromium-review.googlesource.com/772318
Commit-Queue: Ran Ji <ranj@chromium.org>
Reviewed-by: Yusuf Ozuysal <yusufo@chromium.org>
Reviewed-by: Maria Khomenko <mariakhomenko@chromium.org>
Cr-Commit-Position: refs/heads/master@{#519003}
[modify] https://crrev.com/4496af48f345a546bced08eb2ba80f06bd23350a/chrome/android/java/src/org/chromium/chrome/browser/IntentHandler.java
[modify] https://crrev.com/4496af48f345a546bced08eb2ba80f06bd23350a/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabActivity.java
[modify] https://crrev.com/4496af48f345a546bced08eb2ba80f06bd23350a/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappActivity.java
[modify] https://crrev.com/4496af48f345a546bced08eb2ba80f06bd23350a/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappInterceptNavigationDelegate.java
[modify] https://crrev.com/4496af48f345a546bced08eb2ba80f06bd23350a/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappTabDelegate.java