The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/a8d6359dff31bf5db91295dadac0aff2bc02182d

commit a8d6359dff31bf5db91295dadac0aff2bc02182d
Author: yfriedman <yfriedman@chromium.org>
Date: Thu Apr 06 14:26:39 2017

Remove untrusted sources installation flow.

This model of installation involved a user having to lower the security level
of their device to allow apps to install APKs. It was only used for developer
and preview purposes. It's no longer necessary so clean things up.

BUG= 708274 

Review-Url: https://codereview.chromium.org/2791983003
Cr-Commit-Position: refs/heads/master@{#462462}

[modify] https://crrev.com/a8d6359dff31bf5db91295dadac0aff2bc02182d/chrome/android/java/src/org/chromium/chrome/browser/webapps/ChromeWebApkHost.java
[modify] https://crrev.com/a8d6359dff31bf5db91295dadac0aff2bc02182d/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkInstaller.java
[modify] https://crrev.com/a8d6359dff31bf5db91295dadac0aff2bc02182d/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkUpdateManager.java
[modify] https://crrev.com/a8d6359dff31bf5db91295dadac0aff2bc02182d/chrome/android/junit/src/org/chromium/chrome/browser/webapps/WebApkUpdateManagerTest.java
[modify] https://crrev.com/a8d6359dff31bf5db91295dadac0aff2bc02182d/chrome/browser/android/shortcut_helper.cc
[modify] https://crrev.com/a8d6359dff31bf5db91295dadac0aff2bc02182d/chrome/browser/android/webapk/chrome_webapk_host.cc
[modify] https://crrev.com/a8d6359dff31bf5db91295dadac0aff2bc02182d/chrome/browser/android/webapk/chrome_webapk_host.h
[modify] https://crrev.com/a8d6359dff31bf5db91295dadac0aff2bc02182d/chrome/browser/android/webapk/webapk_install_service.h
[modify] https://crrev.com/a8d6359dff31bf5db91295dadac0aff2bc02182d/chrome/browser/android/webapk/webapk_installer.cc
[modify] https://crrev.com/a8d6359dff31bf5db91295dadac0aff2bc02182d/chrome/browser/android/webapk/webapk_installer.h
[modify] https://crrev.com/a8d6359dff31bf5db91295dadac0aff2bc02182d/chrome/browser/android/webapk/webapk_installer_unittest.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/46a8dce41297331415c5d0ecbfe05acd181d1e80

commit 46a8dce41297331415c5d0ecbfe05acd181d1e80
Author: yfriedman <yfriedman@chromium.org>
Date: Thu Apr 06 20:47:09 2017

Remove updates enabled check for webapks.

It's impossible under any normal flow to have a WebAPK but updates disabled now.
BUG= 708274 

Review-Url: https://codereview.chromium.org/2798343002
Cr-Commit-Position: refs/heads/master@{#462610}

[modify] https://crrev.com/46a8dce41297331415c5d0ecbfe05acd181d1e80/chrome/android/java/src/org/chromium/chrome/browser/webapps/ChromeWebApkHost.java
[modify] https://crrev.com/46a8dce41297331415c5d0ecbfe05acd181d1e80/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkUpdateManager.java