Bug 1280148 - Enable Chrome Custom Tabs in Nightly be default r=glandium

MozReview-Commit-ID: E4IXJ3I0Jdo

--HG--
extra : rebase_source : e794d9de2521f53eeae4d49e75bbbd213caeffb4
extra : amend_source : 605466851ab8acb62bd4f400d8fd4beaefc94799

mobile/android/moz.configure

@@ -39,7 +39,7 @@ project_flag('MOZ_ANDROID_DOWNLOAD_CONTENT_SERVICE',
 
 project_flag('MOZ_ANDROID_CUSTOM_TABS',
              help='Enable support for Android custom tabs',
-             default=False)
+             default=delayed_getattr(milestone, 'is_nightly'))
 
 # Enable the Switchboard A/B framework code.
 # Note: The framework is always included in the app. This flag controls