WebmMuxer: handle zero-sized encoded frame in OnEncodedVideo()

WebmMuxer: handle zero-sized encoded frame in OnEncodedVideo()

This CL teaches WebmMuxer to ignore zero-sized encoded frames in
WebmMuxer::OnEncodedVideo(), because these are produced sporadically
by the openh264 encoder.

Bug: 716451
Change-Id: I06261320e1bc6a7042dc7c6a6917115e6ba5e51a
Reviewed-on: https://chromium-review.googlesource.com/514412
Reviewed-by: Emircan Uysaler <emircan@chromium.org>;
Commit-Queue: Miguel Casas <mcasas@chromium.org>;
Cr-Original-Commit-Position: refs/heads/master@{#474668}
Review-Url: https://codereview.chromium.org/2903373004 .
Cr-Commit-Position: refs/branch-heads/3071@{#701}
Cr-Branched-From: a106f0abbf69dad349d4aaf4bcc4f5d376dd2377-refs/heads/master@{#464641}
Committed: https://chromium.googlesource.com/chromium/src/+/2ab7d0b017153fb1bde72ebe8f1c865f03a3c249

[mcasas, 2017-05-26 17:29:51]

Description was changed from

==========
WebmMuxer: handle zero-sized encoded frame in OnEncodedVideo()

This CL teaches WebmMuxer to ignore zero-sized encoded frames in
WebmMuxer::OnEncodedVideo(), because these are produced sporadically
by the openh264 encoder.

Bug: 716451
Change-Id: I06261320e1bc6a7042dc7c6a6917115e6ba5e51a
Reviewed-on: https://chromium-review.googlesource.com/514412
Reviewed-by: Emircan Uysaler <emircan@chromium.org>
Commit-Queue: Miguel Casas <mcasas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#474668}
(cherry picked from commit d70bf910b3b5ee3bfe5afe95031044bfff6523ff)
==========

to

==========
WebmMuxer: handle zero-sized encoded frame in OnEncodedVideo()

This CL teaches WebmMuxer to ignore zero-sized encoded frames in
WebmMuxer::OnEncodedVideo(), because these are produced sporadically
by the openh264 encoder.

Bug: 716451
Change-Id: I06261320e1bc6a7042dc7c6a6917115e6ba5e51a
Reviewed-on: https://chromium-review.googlesource.com/514412
Reviewed-by: Emircan Uysaler <emircan@chromium.org>
Commit-Queue: Miguel Casas <mcasas@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#474668}
Review-Url: https://codereview.chromium.org/2903373004 .
Cr-Commit-Position: refs/branch-heads/3071@{#701}
Cr-Branched-From:
a106f0abbf69dad349d4aaf4bcc4f5d376dd2377-refs/heads/master@{#464641}
Committed:
https://chromium.googlesource.com/chromium/src/+/2ab7d0b017153fb1bde72ebe8f1c...
==========

[mcasas, 2017-05-26 17:29:52]

Committed patchset #1 (id:1) manually as
2ab7d0b017153fb1bde72ebe8f1c865f03a3c249.