Build: Nightly 55.0a1 (2017-04-14).
Environment: Device: HTC (Android 7.0), Huawei MediaPad M2 (Android 5.1.1); Build: Nightly 55.0a1 (2016-02-18); Steps to reproduce: 1. Launch CustomTabsActivity; 2. Scroll down the page. Expected result: The URL bar disappears when scroll down a page. Actual result: CustomTab toolbar stay displayed when scroll down the content from the page. Notes: On Chrome CustomTabs this scenario is implemented.
[triage] It's more like a feature we haven't discussed yet, so I'm setting P3. Also requires UX input on this.
I don't think we're going to do this for the initial release.