Added namespaces in the newly C++ified AEC code

webrtc/modules/audio_processing/aec/aec_common.h

Index: webrtc/modules/audio_processing/aec/aec_common.h
diff --git a/webrtc/modules/audio_processing/aec/aec_common.h b/webrtc/modules/audio_processing/aec/aec_common.h
index 2b1a1c160f1bf26766f531070e71fb0c222b090b..0e3cddeb4c6c64df7b1d3b3c22a113bcf699e193 100644
--- a/webrtc/modules/audio_processing/aec/aec_common.h
+++ b/webrtc/modules/audio_processing/aec/aec_common.h
@@ -21,6 +21,10 @@
 #define ALIGN16_END __attribute__((aligned(16)))
 #endif
 
+#ifdef __cplusplus

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

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]

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.

+namespace webrtc {
+#endif
+
 extern ALIGN16_BEG const float ALIGN16_END WebRtcAec_sqrtHanning[65];
 extern ALIGN16_BEG const float ALIGN16_END WebRtcAec_weightCurve[65];
 extern ALIGN16_BEG const float ALIGN16_END WebRtcAec_overDriveCurve[65];
@@ -28,4 +32,8 @@ extern const float WebRtcAec_kExtendedSmoothingCoefficients[2][2];
 extern const float WebRtcAec_kNormalSmoothingCoefficients[2][2];
 extern const float WebRtcAec_kMinFarendPSD;
 
+#ifdef __cplusplus
+}  // namespace webrtc
+#endif
+
 #endif  // WEBRTC_MODULES_AUDIO_PROCESSING_AEC_AEC_COMMON_H_