Reland of Delete Rtx-related methods from RTPPayloadRegistry.

Reland of Delete Rtx-related methods from RTPPayloadRegistry. (patchset #1 id:1 of https://codereview.webrtc.org/3011093002/ )

Reason for revert:
The cl this change depended on has now been successfully relanded.

Original issue's description:
> Revert of Delete Rtx-related methods from RTPPayloadRegistry. (patchset #3 id:40001 of https://codereview.webrtc.org/3006993002/ )
> 
> Reason for revert:
> This has to be reverted to enable reverting cl https://codereview.webrtc.org/3006063002/, which seems to have broken ulpfec.
> 
> Original issue's description:
> > Delete Rtx-related methods from RTPPayloadRegistry.
> > 
> > Delete methods IsRtx, IsEncapsulated and RestoreOriginalPacket.
> > 
> > BUG=webrtc:7135
> > 
> > Review-Url: https://codereview.webrtc.org/3006993002
> > Cr-Commit-Position: refs/heads/master@{#19739}
> > Committed: https://chromium.googlesource.com/external/webrtc/+/5b4b52264132eefba10bc6880871715f9692da90
> 
> TBR=stefan@webrtc.org,danilchap@webrtc.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=webrtc:7135
> 
> Review-Url: https://codereview.webrtc.org/3011093002
> Cr-Commit-Position: refs/heads/master@{#19742}
> Committed: https://chromium.googlesource.com/external/webrtc/+/a64685325c2f8f51873b67ae8a91f94ffb19d70b

TBR=stefan@webrtc.org,danilchap@webrtc.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=webrtc:7135
Review-Url: https://codereview.webrtc.org/3012253002
Cr-Commit-Position: refs/heads/master@{#19821}
Committed: https://chromium.googlesource.com/external/webrtc/+/f54573bd3b9774db6782af8de0f22242598cb974

[nisse-webrtc, 2017-09-13 13:15:23]

Created Reland of Delete Rtx-related methods from RTPPayloadRegistry.

[stefan-webrtc, 2017-09-13 13:43:52]

lgtm

[danilchap, 2017-09-13 13:45:42]

lgtm

[nisse-webrtc, 2017-09-13 13:49:58]

The CQ bit was checked by nisse@webrtc.org

[commit-bot: I haz the power, 2017-09-13 13:50:06]

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, 2017-09-13 14:13:58]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1505310598275360, "parent_rev":
"4e15e67da8072e8ce7b70c32df3c4be286363ab4", "commit_rev":
"f54573bd3b9774db6782af8de0f22242598cb974"}

[commit-bot: I haz the power, 2017-09-13 14:14:03]

Description was changed from

==========
Reland of Delete Rtx-related methods from RTPPayloadRegistry. (patchset #1 id:1
of https://codereview.webrtc.org/3011093002/ )

Reason for revert:
The cl this change depended on has now been successfully relanded.

Original issue's description:
> Revert of Delete Rtx-related methods from RTPPayloadRegistry. (patchset #3
id:40001 of https://codereview.webrtc.org/3006993002/ )
> 
> Reason for revert:
> This has to be reverted to enable reverting cl
https://codereview.webrtc.org/3006063002/, which seems to have broken ulpfec.
> 
> Original issue's description:
> > Delete Rtx-related methods from RTPPayloadRegistry.
> > 
> > Delete methods IsRtx, IsEncapsulated and RestoreOriginalPacket.
> > 
> > BUG=webrtc:7135
> > 
> > Review-Url: https://codereview.webrtc.org/3006993002
> > Cr-Commit-Position: refs/heads/master@{#19739}
> > Committed:
https://chromium.googlesource.com/external/webrtc/+/5b4b52264132eefba10bc6880...
> 
> TBR=stefan@webrtc.org,danilchap@webrtc.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=webrtc:7135
> 
> Review-Url: https://codereview.webrtc.org/3011093002
> Cr-Commit-Position: refs/heads/master@{#19742}
> Committed:
https://chromium.googlesource.com/external/webrtc/+/a64685325c2f8f51873b67ae8...

TBR=stefan@webrtc.org,danilchap@webrtc.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=webrtc:7135
==========

to

==========
Reland of Delete Rtx-related methods from RTPPayloadRegistry. (patchset #1 id:1
of https://codereview.webrtc.org/3011093002/ )

Reason for revert:
The cl this change depended on has now been successfully relanded.

Original issue's description:
> Revert of Delete Rtx-related methods from RTPPayloadRegistry. (patchset #3
id:40001 of https://codereview.webrtc.org/3006993002/ )
> 
> Reason for revert:
> This has to be reverted to enable reverting cl
https://codereview.webrtc.org/3006063002/, which seems to have broken ulpfec.
> 
> Original issue's description:
> > Delete Rtx-related methods from RTPPayloadRegistry.
> > 
> > Delete methods IsRtx, IsEncapsulated and RestoreOriginalPacket.
> > 
> > BUG=webrtc:7135
> > 
> > Review-Url: https://codereview.webrtc.org/3006993002
> > Cr-Commit-Position: refs/heads/master@{#19739}
> > Committed:
https://chromium.googlesource.com/external/webrtc/+/5b4b52264132eefba10bc6880...
> 
> TBR=stefan@webrtc.org,danilchap@webrtc.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=webrtc:7135
> 
> Review-Url: https://codereview.webrtc.org/3011093002
> Cr-Commit-Position: refs/heads/master@{#19742}
> Committed:
https://chromium.googlesource.com/external/webrtc/+/a64685325c2f8f51873b67ae8...

TBR=stefan@webrtc.org,danilchap@webrtc.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=webrtc:7135

Review-Url: https://codereview.webrtc.org/3012253002
Cr-Commit-Position: refs/heads/master@{#19821}
Committed:
https://chromium.googlesource.com/external/webrtc/+/f54573bd3b9774db6782af8de...
==========

[commit-bot: I haz the power, 2017-09-13 14:14:04]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/external/webrtc/+/f54573bd3b9774db6782af8de...