The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/199f50c2acf6945c1e41d1a17bdf467baee7f8a2

commit 199f50c2acf6945c1e41d1a17bdf467baee7f8a2
Author: Giovanni Ortuño Urquidi <ortuno@chromium.org>
Date: Fri Nov 10 06:14:15 2017

desktop-pwas: Bounce out-of-scope navigations back to the browser

Rather than navigating to a third party website that probably has no
way to get back to the original app, we bounce back to an existing
browser window.

Bug:  772803 
Change-Id: Ie662bfa59e920d059ade3cc06d77664732ab31fe
Reviewed-on: https://chromium-review.googlesource.com/706882
Commit-Queue: Giovanni Ortuño Urquidi <ortuno@chromium.org>
Reviewed-by: Ben Wells <benwells@chromium.org>
Cr-Commit-Position: refs/heads/master@{#515460}
[modify] https://crrev.com/199f50c2acf6945c1e41d1a17bdf467baee7f8a2/chrome/browser/extensions/bookmark_app_navigation_throttle.cc
[modify] https://crrev.com/199f50c2acf6945c1e41d1a17bdf467baee7f8a2/chrome/browser/extensions/bookmark_app_navigation_throttle.h
[modify] https://crrev.com/199f50c2acf6945c1e41d1a17bdf467baee7f8a2/chrome/browser/extensions/bookmark_app_navigation_throttle_browsertest.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d5945e06e67202c583eb496a54bd5f8f162b9760

commit d5945e06e67202c583eb496a54bd5f8f162b9760
Author: Giovanni Ortuño Urquidi <ortuno@chromium.org>
Date: Thu Nov 30 06:52:43 2017

desktop-pwas: When in an app, bounce out of scope form submissions to a new tab

Before, BookmarkAppNavigationThrottle would ignore all form submissions.
Now, it redirects out-of-scope form submissions inside an app window to
a new browser tab.

OpenApplication doesn't support post requests yet, so in-scope
post requests in a regular browser tab for now remain in the tab.

Bug:  772803 
Change-Id: Iea785701ed74cb02664bc90b6ea079e40e9df708
Reviewed-on: https://chromium-review.googlesource.com/781309
Commit-Queue: Giovanni Ortuño Urquidi <ortuno@chromium.org>
Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Reviewed-by: Ben Wells <benwells@chromium.org>
Reviewed-by: Matt Giuca <mgiuca@chromium.org>
Cr-Commit-Position: refs/heads/master@{#520464}
[modify] https://crrev.com/d5945e06e67202c583eb496a54bd5f8f162b9760/chrome/browser/extensions/bookmark_app_navigation_throttle.cc
[modify] https://crrev.com/d5945e06e67202c583eb496a54bd5f8f162b9760/chrome/browser/extensions/bookmark_app_navigation_throttle_browsertest.cc
[modify] https://crrev.com/d5945e06e67202c583eb496a54bd5f8f162b9760/content/browser/frame_host/navigation_handle_impl.cc
[modify] https://crrev.com/d5945e06e67202c583eb496a54bd5f8f162b9760/content/browser/frame_host/navigation_handle_impl.h
[modify] https://crrev.com/d5945e06e67202c583eb496a54bd5f8f162b9760/content/browser/frame_host/render_frame_host_manager.cc
[modify] https://crrev.com/d5945e06e67202c583eb496a54bd5f8f162b9760/content/public/browser/navigation_handle.h
[modify] https://crrev.com/d5945e06e67202c583eb496a54bd5f8f162b9760/content/public/test/test_navigation_observer.cc
[modify] https://crrev.com/d5945e06e67202c583eb496a54bd5f8f162b9760/content/public/test/test_navigation_observer.h