The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/34cf6ef588ab528d111fab5efd93e481c5a12d6c

commit 34cf6ef588ab528d111fab5efd93e481c5a12d6c
Author: ianwen <ianwen@chromium.org>
Date: Thu Jan 19 20:21:23 2017

[Android] Add an option in CCT to disable star and download button

After this CL, some CCT clients can choose to disable some newly added
buttons in menu.

BUG= 682453 

Review-Url: https://codereview.chromium.org/2647593002
Cr-Commit-Position: refs/heads/master@{#444833}

[modify] https://crrev.com/34cf6ef588ab528d111fab5efd93e481c5a12d6c/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabActivity.java
[modify] https://crrev.com/34cf6ef588ab528d111fab5efd93e481c5a12d6c/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabAppMenuPropertiesDelegate.java
[modify] https://crrev.com/34cf6ef588ab528d111fab5efd93e481c5a12d6c/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabIntentDataProvider.java