Changed AECM to be built using C++

webrtc/modules/audio_processing/aecm/aecm_core_mips.cc

Index: webrtc/modules/audio_processing/aecm/aecm_core_mips.cc
diff --git a/webrtc/modules/audio_processing/aecm/aecm_core_mips.c b/webrtc/modules/audio_processing/aecm/aecm_core_mips.cc
similarity index 99%
rename from webrtc/modules/audio_processing/aecm/aecm_core_mips.c
rename to webrtc/modules/audio_processing/aecm/aecm_core_mips.cc
index 3ca9982ebfa4321716687d73d2c056add62f133d..bca32fea1c042ac643d38cae82be2f3d51c85b02 100644
--- a/webrtc/modules/audio_processing/aecm/aecm_core_mips.c
+++ b/webrtc/modules/audio_processing/aecm/aecm_core_mips.cc
@@ -13,7 +13,9 @@
 #include <assert.h>
 
 #include "webrtc/modules/audio_processing/aecm/echo_control_mobile.h"
+extern "C" {
 #include "webrtc/modules/audio_processing/utility/delay_estimator_wrapper.h"
+}
 
 static const ALIGN8_BEG int16_t WebRtcAecm_kSqrtHanning[] ALIGN8_END = {
   0, 399, 798, 1196, 1594, 1990, 2386, 2780, 3172,
@@ -1563,4 +1565,3 @@ static void ComfortNoise(AecmCore* aecm,
   sgn = ((int)tt) >> 31;
   out[PART_LEN].imag = sgn == (int16_t)(tt >> 15) ? (int16_t)tt : (16384 ^ sgn);
 }
-