Add two buckets to SpdyPushedStreamFate histogram enum.

Add new bucket and record histogram if push is cancelled because
resource was found in cache.  This bucket was missing by mistake.

Add new bucket and record histogram if push is rejected because push
is disabled.  This functionality was just added at
https://crrev.com/c/1141282.

Bug: 232040, 862805
Change-Id: I70af4cfc077bd65baccc7fe06cadb7dfe29d42fe
Reviewed-on: https://chromium-review.googlesource.com/1142958
Commit-Queue: Bence Béky <bnc@chromium.org>
Reviewed-by: Ryan Hamilton <rch@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#576737}
5 files changed