Move AudioCodingModuleImpl to anonymous namespace in audio_coding_module.cc

Move AudioCodingModuleImpl to anonymous namespace in audio_coding_module.cc

AudioCodingModuleImpl is the only implementation of the
AudioCodingModule interface (except for test mocks). So it's a good
fit to put it in an anonymous namespace in the interface's .cc file,
to ensure that no one except AudioCodingModule::Create ever references
it.

Except for moving code, this CL introduces two other small changes:

  * It cleans up the set of #includes in audio_coding_module.cc.
    Specifically, I removed #includes that were already present in
    audio_coding_module.h, and did not bring along any #includes from
    audio_coding_module_impl.h and .cc except those that were
    necessary to get it to compile.

  * It moves AudioCodingModuleImpl from the webrtc::acm2 to the
    webrtc::<anonymous> namespace. This means I had to qualify a few
    things it references with acm2::.

Committed: https://crrev.com/c13ded54ca8192fbd1286f8296e6f92326633ffa
Cr-Commit-Position: refs/heads/master@{#13191}

[kwiberg-webrtc, 2016-06-16 02:36:50]

kwiberg@webrtc.org changed reviewers:
+ henrik.lundin@webrtc.org

[hlundin-webrtc, 2016-06-17 10:36:42]

lgtm

[kwiberg-webrtc, 2016-06-17 10:40:21]

The CQ bit was checked by kwiberg@webrtc.org

[commit-bot: I haz the power, 2016-06-17 10:40:35]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2069723003/1

[commit-bot: I haz the power, 2016-06-17 13:00:50]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-17 13:01:00]

Description was changed from

==========
Move AudioCodingModuleImpl to anonymous namespace in audio_coding_module.cc

AudioCodingModuleImpl is the only implementation of the
AudioCodingModule interface (except for test mocks). So it's a good
fit to put it in an anonymous namespace in the interface's .cc file,
to ensure that no one except AudioCodingModule::Create ever references
it.

Except for moving code, this CL introduces two other small changes:

  * It cleans up the set of #includes in audio_coding_module.cc.
    Specifically, I removed #includes that were already present in
    audio_coding_module.h, and did not bring along any #includes from
    audio_coding_module_impl.h and .cc except those that were
    necessary to get it to compile.

  * It moves AudioCodingModuleImpl from the webrtc::acm2 to the
    webrtc::<anonymous> namespace. This means I had to qualify a few
    things it references with acm2::.
==========

to

==========
Move AudioCodingModuleImpl to anonymous namespace in audio_coding_module.cc

AudioCodingModuleImpl is the only implementation of the
AudioCodingModule interface (except for test mocks). So it's a good
fit to put it in an anonymous namespace in the interface's .cc file,
to ensure that no one except AudioCodingModule::Create ever references
it.

Except for moving code, this CL introduces two other small changes:

  * It cleans up the set of #includes in audio_coding_module.cc.
    Specifically, I removed #includes that were already present in
    audio_coding_module.h, and did not bring along any #includes from
    audio_coding_module_impl.h and .cc except those that were
    necessary to get it to compile.

  * It moves AudioCodingModuleImpl from the webrtc::acm2 to the
    webrtc::<anonymous> namespace. This means I had to qualify a few
    things it references with acm2::.

Committed: https://crrev.com/c13ded54ca8192fbd1286f8296e6f92326633ffa
Cr-Commit-Position: refs/heads/master@{#13191}
==========

[commit-bot: I haz the power, 2016-06-17 13:01:01]

Patchset 1 (id:??) landed as
https://crrev.com/c13ded54ca8192fbd1286f8296e6f92326633ffa
Cr-Commit-Position: refs/heads/master@{#13191}