Enable FP reporting for WebMIDI policy violations.

This queues a report through the Reporting API whenever
navigator.requestMIDIAccess is invoked from a frame in which the 'midi`'
feature is not allowed according to feature policy.

Bug: 867471
Change-Id: Ib7966a3721067fcf7a325d75377178caaa4b327a
Reviewed-on: https://chromium-review.googlesource.com/1195703
Commit-Queue: Ian Clelland <iclelland@chromium.org>
Reviewed-by: Takashi Toyoshima <toyoshim@chromium.org>
Cr-Commit-Position: refs/heads/master@{#587617}
3 files changed