Implementation for feature policy - vibrate.
Disable Navigator.vibrate() unless enabled through feature policy.

Added tests with runtime flag is on

Also modified IsFeatureEnabledInFrame for the case EnableForSelf, should only be enabled when with same origin.

BUG=623682

Review-Url: https://codereview.chromium.org/2492623002
Cr-Commit-Position: refs/heads/master@{#434423}
16 files changed