Changed name for the upcoming AEC from NextGenerationAec to AEC3.

webrtc/modules/audio_processing/aec/aec_core.h

Index: webrtc/modules/audio_processing/aec/aec_core.h
diff --git a/webrtc/modules/audio_processing/aec/aec_core.h b/webrtc/modules/audio_processing/aec/aec_core.h
index 854b7236e73fe7c0df5e62eabc299292f13bcc26..ffff8cae7edf091778f53e5a42eaa6834ed20542 100644
--- a/webrtc/modules/audio_processing/aec/aec_core.h
+++ b/webrtc/modules/audio_processing/aec/aec_core.h
@@ -114,10 +114,10 @@ void WebRtcAec_enable_delay_agnostic(AecCore* self, int enable);
 int WebRtcAec_delay_agnostic_enabled(AecCore* self);
 
 // Non-zero enables, zero disables.
-void WebRtcAec_enable_next_generation_aec(AecCore* self, int enable);
+void WebRtcAec_enable_aec3(AecCore* self, int enable);
 
 // Returns 1 if the next generation aec is enabled and zero if disabled.
-int WebRtcAec_next_generation_aec_enabled(AecCore* self);
+int WebRtcAec_aec3_enabled(AecCore* self);
 
 // Enables or disables extended filter mode. Non-zero enables, zero disables.
 void WebRtcAec_enable_extended_filter(AecCore* self, int enable);