Added namespaces in the newly C++ified AEC code

This CL introduces namespaces in the aec c++ files
(the ones that were recently moved from c)

There are many files changed but most changes just
consist of adding namespaces.

In aec_common.h an C++-specific #ifdef needed to be added as
that file is both included from C and C++. I could see no
way around that but please let me know if there is a better
way around that.

BUG=webrtc:5201
Committed: https://crrev.com/50e21bd40b2268dc180b2120304f2a31afc05a3d
Cr-Commit-Position: refs/heads/master@{#11883}

[peah-webrtc, 2016-03-04 10:06:38]

Description was changed from

==========
Introduced namespaces in the AEC

BUG=
==========

to

==========
Introduced namespaces in the AEC

BUG=webrtc:5201
==========

[peah-webrtc, 2016-03-04 10:42:53]

Description was changed from

==========
Introduced namespaces in the AEC

BUG=webrtc:5201
==========

to

==========
This CL introduces namespaces in the aec c++ files
(the ones that were recently moved from c)

There are many files changed but most changes just
consist of adding namespaces.

There are some other changes that were required for this
to work though and they are:
-The #defines andinclusion of aec_core.h from aec_core_internal.h
 needed to be removed as the started giving provle


BUG=webrtc:5201
==========

[peah-webrtc, 2016-03-04 10:45:40]

Patchset #1 (id:1) has been deleted

[peah-webrtc, 2016-03-04 10:50:30]

Patchset #1 (id:20001) has been deleted

[peah-webrtc, 2016-03-04 10:53:22]

Description was changed from

==========
This CL introduces namespaces in the aec c++ files
(the ones that were recently moved from c)

There are many files changed but most changes just
consist of adding namespaces.

There are some other changes that were required for this
to work though and they are:
-The #defines andinclusion of aec_core.h from aec_core_internal.h
 needed to be removed as the started giving provle


BUG=webrtc:5201
==========

to

==========
This CL introduces namespaces in the aec c++ files
(the ones that were recently moved from c)

There are many files changed but most changes just
consist of adding namespaces.

In aec_common.h an C++-specific #ifdef needed to be added as
that file is both included from C and C++. I could see no
way around that but please let me know if there is a better
way around that.

BUG=webrtc:5201
==========

[peah-webrtc, 2016-03-04 10:53:23]

peah@webrtc.org changed reviewers:
+ solenberg@webrtc.org

[the sun, 2016-03-04 12:49:46]

lgtm

https://codereview.webrtc.org/1766663002/diff/40001/webrtc/modules/audio_proc...
File webrtc/modules/audio_processing/aec/aec_common.h (right):

https://codereview.webrtc.org/1766663002/diff/40001/webrtc/modules/audio_proc...
webrtc/modules/audio_processing/aec/aec_common.h:24: #ifdef __cplusplus
So we're still using this from C code? Does it make sense to C++ify that first?

[peah-webrtc, 2016-03-04 13:11:02]

https://codereview.webrtc.org/1766663002/diff/40001/webrtc/modules/audio_proc...
File webrtc/modules/audio_processing/aec/aec_common.h (right):

https://codereview.webrtc.org/1766663002/diff/40001/webrtc/modules/audio_proc...
webrtc/modules/audio_processing/aec/aec_common.h:24: #ifdef __cplusplus
On 2016/03/04 12:49:46, the sun wrote:
> So we're still using this from C code? Does it make sense to C++ify that
first?

That is a very good point. It was discussed, and the decision was taken to wait
with that until we have decided where to put that code.

[peah-webrtc, 2016-03-04 13:21:08]

The CQ bit was checked by peah@webrtc.org

[commit-bot: I haz the power, 2016-03-04 13:21:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1766663002/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1766663002/40001

[commit-bot: I haz the power, 2016-03-04 15:21:57]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-03-04 15:21:58]

Try jobs failed on following builders:
  android_arm64_rel on tryserver.webrtc (JOB_TIMED_OUT, no build URL)
  android_dbg on tryserver.webrtc (JOB_TIMED_OUT, no build URL)
  android_rel on tryserver.webrtc (JOB_TIMED_OUT, no build URL)
  linux_baremetal on tryserver.webrtc (JOB_TIMED_OUT, no build URL)
  mac_baremetal on tryserver.webrtc (JOB_TIMED_OUT, no build URL)
  win_baremetal on tryserver.webrtc (JOB_TIMED_OUT, no build URL)

[peah-webrtc, 2016-03-04 19:49:18]

The CQ bit was checked by peah@webrtc.org

[commit-bot: I haz the power, 2016-03-04 19:49:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1766663002/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1766663002/40001

[commit-bot: I haz the power, 2016-03-04 21:50:18]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-03-04 21:50:19]

Try jobs failed on following builders:
  android_arm64_rel on tryserver.webrtc (JOB_TIMED_OUT, no build URL)

[peah-webrtc, 2016-03-04 22:16:46]

The CQ bit was checked by peah@webrtc.org

[peah-webrtc, 2016-03-04 22:16:46]

The patchset sent to the CQ was uploaded after l-g-t-m from solenberg@webrtc.org
Link to the patchset: https://codereview.webrtc.org/1766663002/#ps60001 (title:
"Rebase of latest master")

[commit-bot: I haz the power, 2016-03-04 22:16:51]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1766663002/60001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1766663002/60001

[commit-bot: I haz the power, 2016-03-05 00:17:45]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-03-05 00:17:46]

Exceeded global retry quota

[peah-webrtc, 2016-03-05 15:36:32]

The CQ bit was checked by peah@webrtc.org

[peah-webrtc, 2016-03-05 15:36:32]

The patchset sent to the CQ was uploaded after l-g-t-m from solenberg@webrtc.org
Link to the patchset: https://codereview.webrtc.org/1766663002/#ps80001 (title:
"Rebase with latest master")

[commit-bot: I haz the power, 2016-03-05 15:36:35]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1766663002/80001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1766663002/80001

[commit-bot: I haz the power, 2016-03-05 16:39:31]

Description was changed from

==========
This CL introduces namespaces in the aec c++ files
(the ones that were recently moved from c)

There are many files changed but most changes just
consist of adding namespaces.

In aec_common.h an C++-specific #ifdef needed to be added as
that file is both included from C and C++. I could see no
way around that but please let me know if there is a better
way around that.

BUG=webrtc:5201
==========

to

==========
This CL introduces namespaces in the aec c++ files
(the ones that were recently moved from c)

There are many files changed but most changes just
consist of adding namespaces.

In aec_common.h an C++-specific #ifdef needed to be added as
that file is both included from C and C++. I could see no
way around that but please let me know if there is a better
way around that.

BUG=webrtc:5201
==========

[commit-bot: I haz the power, 2016-03-05 16:39:36]

Committed patchset #3 (id:80001)

[commit-bot: I haz the power, 2016-03-05 16:39:38]

Description was changed from

==========
This CL introduces namespaces in the aec c++ files
(the ones that were recently moved from c)

There are many files changed but most changes just
consist of adding namespaces.

In aec_common.h an C++-specific #ifdef needed to be added as
that file is both included from C and C++. I could see no
way around that but please let me know if there is a better
way around that.

BUG=webrtc:5201
==========

to

==========
This CL introduces namespaces in the aec c++ files
(the ones that were recently moved from c)

There are many files changed but most changes just
consist of adding namespaces.

In aec_common.h an C++-specific #ifdef needed to be added as
that file is both included from C and C++. I could see no
way around that but please let me know if there is a better
way around that.

BUG=webrtc:5201

Committed: https://crrev.com/50e21bd40b2268dc180b2120304f2a31afc05a3d
Cr-Commit-Position: refs/heads/master@{#11883}
==========

[commit-bot: I haz the power, 2016-03-05 16:39:40]

Patchset 3 (id:??) landed as
https://crrev.com/50e21bd40b2268dc180b2120304f2a31afc05a3d
Cr-Commit-Position: refs/heads/master@{#11883}