Add Http2PushPromiseIndexTest.

Bug: 554220
Change-Id: Id4652e6c43de606dacfb4a32d01d0cb3e057a226
Reviewed-on: https://chromium-review.googlesource.com/700403
Reviewed-by: Helen Li <xunjieli@chromium.org>
Commit-Queue: Bence Béky <bnc@chromium.org>
Cr-Commit-Position: refs/heads/master@{#506710}
2 files changed