The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/16c3177a76dd7f69334c37cdfe15c7c21ac8d6e6

commit 16c3177a76dd7f69334c37cdfe15c7c21ac8d6e6
Author: Ran Ji <ranj@chromium.org>
Date: Thu May 10 02:37:32 2018

Stays in CCT for current WebAPK urls

This cl made two changes:
1. If a url is opened from WebAPK through window.open(), and that url is
within the current WebAPK scope. Open it in CCT instead of using WebAPK

2. If a CCT is opened by a WebAPK, and the CCT redirects to a url within
the WebAPK scope, stay in the CCT instead of using WebAPK to open the url.

Bug:  831806 , 771418
Change-Id: Ibf522b3b49599ec8bbb76f515f3b96b07707b56d
Reviewed-on: https://chromium-review.googlesource.com/1008735
Commit-Queue: Ran Ji <ranj@chromium.org>
Reviewed-by: Peter Kotwicz <pkotwicz@chromium.org>
Reviewed-by: Yaron Friedman <yfriedman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#557433}
[modify] https://crrev.com/16c3177a76dd7f69334c37cdfe15c7c21ac8d6e6/chrome/android/java/src/org/chromium/chrome/browser/externalnav/ExternalNavigationDelegateImpl.java
[modify] https://crrev.com/16c3177a76dd7f69334c37cdfe15c7c21ac8d6e6/chrome/android/java/src/org/chromium/chrome/browser/externalnav/ExternalNavigationHandler.java
[modify] https://crrev.com/16c3177a76dd7f69334c37cdfe15c7c21ac8d6e6/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappActivity.java
[modify] https://crrev.com/16c3177a76dd7f69334c37cdfe15c7c21ac8d6e6/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappTabDelegate.java
[modify] https://crrev.com/16c3177a76dd7f69334c37cdfe15c7c21ac8d6e6/chrome/android/javatests/src/org/chromium/chrome/browser/FullscreenActivityTest.java
[modify] https://crrev.com/16c3177a76dd7f69334c37cdfe15c7c21ac8d6e6/chrome/android/javatests/src/org/chromium/chrome/browser/webapps/WebApkIntegrationTest.java
[modify] https://crrev.com/16c3177a76dd7f69334c37cdfe15c7c21ac8d6e6/chrome/android/javatests/src/org/chromium/chrome/browser/webapps/WebappActivityTestRule.java
[modify] https://crrev.com/16c3177a76dd7f69334c37cdfe15c7c21ac8d6e6/chrome/android/javatests/src/org/chromium/chrome/browser/webapps/WebappNavigationTest.java
[modify] https://crrev.com/16c3177a76dd7f69334c37cdfe15c7c21ac8d6e6/chrome/test/android/javatests/src/org/chromium/chrome/test/ChromeActivityTestRule.java
[add] https://crrev.com/16c3177a76dd7f69334c37cdfe15c7c21ac8d6e6/chrome/test/data/android/form.html