Rename class RtpStreamReceiver --> RtpVideoStreamReceiver.

Rename class RtpStreamReceiver --> RtpVideoStreamReceiver.

This class is video-specific, and we want to free the name
"RtpStreamReceiver" so it can be reused for a media-independent RTP
receive class.

Also renames related files.

BUG=webrtc:7135
Review-Url: https://codereview.webrtc.org/2926253002
Cr-Commit-Position: refs/heads/master@{#18510}
Committed: https://chromium.googlesource.com/external/webrtc/+/b1f2ff900e7cb620ddb9282046f1d73f2e76a6f3

[nisse-webrtc, 2017-06-08 13:15:07]

nisse@webrtc.org changed reviewers:
+ danilchap@webrtc.org, sprang@webrtc.org

[nisse-webrtc, 2017-06-08 13:15:08]

PTAL.

[danilchap, 2017-06-08 13:23:35]

lgtm

[sprang_webrtc, 2017-06-09 10:35:05]

lgtm

[nisse-webrtc, 2017-06-09 10:40:31]

The CQ bit was checked by nisse@webrtc.org

[commit-bot: I haz the power, 2017-06-09 10:40:36]

CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.webrtc.org/...

[commit-bot: I haz the power, 2017-06-09 11:01:55]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1497004831143070, "parent_rev":
"e2baffb055c90a38407d969aae19e18206a56d26", "commit_rev":
"b1f2ff900e7cb620ddb9282046f1d73f2e76a6f3"}

[commit-bot: I haz the power, 2017-06-09 11:01:59]

Description was changed from

==========
Rename class RtpStreamReceiver --> RtpVideoStreamReceiver.

This class is video-specific, and we want to free the name
"RtpStreamReceiver" so it can be reused for a media-independent RTP
receive class.

Also renames related files.

BUG=webrtc:7135
==========

to

==========
Rename class RtpStreamReceiver --> RtpVideoStreamReceiver.

This class is video-specific, and we want to free the name
"RtpStreamReceiver" so it can be reused for a media-independent RTP
receive class.

Also renames related files.

BUG=webrtc:7135

Review-Url: https://codereview.webrtc.org/2926253002
Cr-Commit-Position: refs/heads/master@{#18510}
Committed:
https://chromium.googlesource.com/external/webrtc/+/b1f2ff900e7cb620ddb928204...
==========

[commit-bot: I haz the power, 2017-06-09 11:02:00]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/external/webrtc/+/b1f2ff900e7cb620ddb928204...