Peter, could you please verify whether it is still crash on Jellybean?

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/be21c85ff9c6e897496e1731a76e9ef24af600ac

commit be21c85ff9c6e897496e1731a76e9ef24af600ac
Author: hanxi <hanxi@chromium.org>
Date: Thu Sep 15 20:16:17 2016

Fix WebAPK crashes on launch on Jellybean.

The crash is caused by using getId() instead of mWebappInfo.id() when registering
WebAPK. WebApkManagedActivity is launched on Jellybean instead of WebApkActivity,
and getId() in WebApkManagedActivity returns the index of the managered activity,
rather than the Webapp id.

BUG= 640434 

Review-Url: https://codereview.chromium.org/2339623002
Cr-Commit-Position: refs/heads/master@{#418949}

[modify] https://crrev.com/be21c85ff9c6e897496e1731a76e9ef24af600ac/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkActivity.java
[modify] https://crrev.com/be21c85ff9c6e897496e1731a76e9ef24af600ac/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkManagedActivity.java
[modify] https://crrev.com/be21c85ff9c6e897496e1731a76e9ef24af600ac/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappActivity.java
[modify] https://crrev.com/be21c85ff9c6e897496e1731a76e9ef24af600ac/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappManagedActivity.java

Test steps:
1) Uninstall any currently installed "test WebAPKs" (APKs with yellow hexagon)
2) Enable WebAPKs by following steps in https://docs.google.com/a/google.com/document/d/1gHZ1YXO7QRZO6hgt11uqItNpl5WrZBJYxPYAnuJphXU/edit?usp=sharing
3) "Force Stop" Chrome
4) In Chrome for Android, navigate to goo.gl/36GSsH
5) Select "Add to Home screen" from the app menu. An infobar will show briefly. Press the "Install" button when asked to install the "Simple Test" APK
6) Launch the newly created APK.
7) Check that there is no crash