Revert of Delete class SSRCDatabase, and its global ssrc registry.

Revert of Delete class SSRCDatabase, and its global ssrc registry. (patchset #20 id:370001 of https://codereview.webrtc.org/2644303002/ )

Reason for revert:
Breaks webrtc_perf_tests reliably:
https://build.chromium.org/p/client.webrtc.perf/builders/Android32%20Tests%20%28L%20Nexus5%29/builds/1780
https://build.chromium.org/p/client.webrtc.perf/builders/Android32%20Tests%20%28L%20Nexus4%29/builds/178

We're actively working on getting a quick version of webrtc_perf_tests up on the trybots again to prevent breakages like this: https://bugs.chromium.org/p/webrtc/issues/detail?id=7101

Original issue's description:
> Delete class SSRCDatabase, and its global ssrc registry, 
> and the method RTPSender::GenerateNewSSRC.
> 
> It's now mandatory for higher layers to call SetSSRC, RTPSender 
> no longer allocates any ssrc by default.
> 
> BUG=webrtc:4306, webrtc:6887
> 
> Review-Url: https://codereview.webrtc.org/2644303002
> Cr-Commit-Position: refs/heads/master@{#16670}
> Committed: https://chromium.googlesource.com/external/webrtc/+/b78d4d13835f628e722a57abae2bf06ba3655921

TBR=solenberg@webrtc.org,stefan@webrtc.org,danilchap@webrtc.org,ivoc@webrtc.org,nisse@webrtc.org
NOTRY=True
BUG=webrtc:4306, webrtc:6887
Review-Url: https://codereview.webrtc.org/2700413002
Cr-Commit-Position: refs/heads/master@{#16693}
Committed: https://chromium.googlesource.com/external/webrtc/+/b5848ecbf5f7b310108546ec6b858fe93452f58e

[kjellander (google.com), 2017-02-18 19:50:12]

Created Revert of Delete class SSRCDatabase, and its global ssrc registry.

[kjellander (google.com), 2017-02-18 19:50:58]

Description was changed from

==========
Revert of Delete class SSRCDatabase, and its global ssrc registry. (patchset #20
id:370001 of https://codereview.webrtc.org/2644303002/ )

Reason for revert:
Breaks webrtc_perf_tests reliably:
https://build.chromium.org/p/client.webrtc.perf/builders/Android32%20Tests%20...
https://build.chromium.org/p/client.webrtc.perf/builders/Android32%20Tests%20...

We're actively working on getting a quick version of webrtc_perf_tests up on the
trybots again to prevent breakages like this:
https://bugs.chromium.org/p/webrtc/issues/detail?id=7101

Original issue's description:
> Delete class SSRCDatabase, and its global ssrc registry, 
> and the method RTPSender::GenerateNewSSRC.
> 
> It's now mandatory for higher layers to call SetSSRC, RTPSender 
> no longer allocates any ssrc by default.
> 
> BUG=webrtc:4306,webrtc:6887
> 
> Review-Url: https://codereview.webrtc.org/2644303002
> Cr-Commit-Position: refs/heads/master@{#16670}
> Committed:
https://chromium.googlesource.com/external/webrtc/+/b78d4d13835f628e722a57aba...

TBR=solenberg@webrtc.org,stefan@webrtc.org,danilchap@webrtc.org,ivoc@webrtc.o...
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=webrtc:4306,webrtc:6887
==========

to

==========
Revert of Delete class SSRCDatabase, and its global ssrc registry. (patchset #20
id:370001 of https://codereview.webrtc.org/2644303002/ )

Reason for revert:
Breaks webrtc_perf_tests reliably:
https://build.chromium.org/p/client.webrtc.perf/builders/Android32%20Tests%20...
https://build.chromium.org/p/client.webrtc.perf/builders/Android32%20Tests%20...

We're actively working on getting a quick version of webrtc_perf_tests up on the
trybots again to prevent breakages like this:
https://bugs.chromium.org/p/webrtc/issues/detail?id=7101

Original issue's description:
> Delete class SSRCDatabase, and its global ssrc registry, 
> and the method RTPSender::GenerateNewSSRC.
> 
> It's now mandatory for higher layers to call SetSSRC, RTPSender 
> no longer allocates any ssrc by default.
> 
> BUG=webrtc:4306,webrtc:6887
> 
> Review-Url: https://codereview.webrtc.org/2644303002
> Cr-Commit-Position: refs/heads/master@{#16670}
> Committed:
https://chromium.googlesource.com/external/webrtc/+/b78d4d13835f628e722a57aba...

TBR=solenberg@webrtc.org,stefan@webrtc.org,danilchap@webrtc.org,ivoc@webrtc.o...
NOTRY=True
BUG=webrtc:4306,webrtc:6887
==========

[kjellander_webrtc, 2017-02-18 19:51:18]

kjellander@webrtc.org changed reviewers:
+ kjellander@webrtc.org

[kjellander_webrtc, 2017-02-18 19:51:19]

lgtm

[kjellander_webrtc, 2017-02-18 19:58:31]

The CQ bit was checked by kjellander@webrtc.org

[commit-bot: I haz the power, 2017-02-18 19:58:34]

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, 2017-02-18 20:00:50]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1487447911306290, "parent_rev":
"6db7cd220d686443d573955df36247d0acc00624", "commit_rev":
"b5848ecbf5f7b310108546ec6b858fe93452f58e"}

[commit-bot: I haz the power, 2017-02-18 20:00:53]

Description was changed from

==========
Revert of Delete class SSRCDatabase, and its global ssrc registry. (patchset #20
id:370001 of https://codereview.webrtc.org/2644303002/ )

Reason for revert:
Breaks webrtc_perf_tests reliably:
https://build.chromium.org/p/client.webrtc.perf/builders/Android32%20Tests%20...
https://build.chromium.org/p/client.webrtc.perf/builders/Android32%20Tests%20...

We're actively working on getting a quick version of webrtc_perf_tests up on the
trybots again to prevent breakages like this:
https://bugs.chromium.org/p/webrtc/issues/detail?id=7101

Original issue's description:
> Delete class SSRCDatabase, and its global ssrc registry, 
> and the method RTPSender::GenerateNewSSRC.
> 
> It's now mandatory for higher layers to call SetSSRC, RTPSender 
> no longer allocates any ssrc by default.
> 
> BUG=webrtc:4306,webrtc:6887
> 
> Review-Url: https://codereview.webrtc.org/2644303002
> Cr-Commit-Position: refs/heads/master@{#16670}
> Committed:
https://chromium.googlesource.com/external/webrtc/+/b78d4d13835f628e722a57aba...

TBR=solenberg@webrtc.org,stefan@webrtc.org,danilchap@webrtc.org,ivoc@webrtc.o...
NOTRY=True
BUG=webrtc:4306,webrtc:6887
==========

to

==========
Revert of Delete class SSRCDatabase, and its global ssrc registry. (patchset #20
id:370001 of https://codereview.webrtc.org/2644303002/ )

Reason for revert:
Breaks webrtc_perf_tests reliably:
https://build.chromium.org/p/client.webrtc.perf/builders/Android32%20Tests%20...
https://build.chromium.org/p/client.webrtc.perf/builders/Android32%20Tests%20...

We're actively working on getting a quick version of webrtc_perf_tests up on the
trybots again to prevent breakages like this:
https://bugs.chromium.org/p/webrtc/issues/detail?id=7101

Original issue's description:
> Delete class SSRCDatabase, and its global ssrc registry, 
> and the method RTPSender::GenerateNewSSRC.
> 
> It's now mandatory for higher layers to call SetSSRC, RTPSender 
> no longer allocates any ssrc by default.
> 
> BUG=webrtc:4306,webrtc:6887
> 
> Review-Url: https://codereview.webrtc.org/2644303002
> Cr-Commit-Position: refs/heads/master@{#16670}
> Committed:
https://chromium.googlesource.com/external/webrtc/+/b78d4d13835f628e722a57aba...

TBR=solenberg@webrtc.org,stefan@webrtc.org,danilchap@webrtc.org,ivoc@webrtc.o...
NOTRY=True
BUG=webrtc:4306,webrtc:6887

Review-Url: https://codereview.webrtc.org/2700413002
Cr-Commit-Position: refs/heads/master@{#16693}
Committed:
https://chromium.googlesource.com/external/webrtc/+/b5848ecbf5f7b310108546ec6...
==========

[commit-bot: I haz the power, 2017-02-18 20:00:54]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/external/webrtc/+/b5848ecbf5f7b310108546ec6...

[kjellander_webrtc, 2017-02-18 20:59:25]

On 2017/02/18 20:00:54, commit-bot: I haz the power wrote:
> Committed patchset #1 (id:1) as
>
https://chromium.googlesource.com/external/webrtc/+/b5848ecbf5f7b310108546ec6...

I can confirm the bots went back to green after this.

[nisse-webrtc, 2017-02-20 08:14:57]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.webrtc.org/2702203002/ by nisse@webrtc.org.

The reason for reverting is: Intend to fix perf problem and reland..