Changed name for the upcoming AEC from NextGenerationAec to AEC3.

webrtc/modules/audio_processing/include/audio_processing.h

Index: webrtc/modules/audio_processing/include/audio_processing.h
diff --git a/webrtc/modules/audio_processing/include/audio_processing.h b/webrtc/modules/audio_processing/include/audio_processing.h
index 8af5f53e1eb99135072b5592e48694e102587797..6fb10c6f85156624ccc05b7669f32ca20ffaa6f6 100644
--- a/webrtc/modules/audio_processing/include/audio_processing.h
+++ b/webrtc/modules/audio_processing/include/audio_processing.h
@@ -73,10 +73,10 @@ struct ExtendedFilter {
 // standard methods for echo removal in the AEC. This configuration only applies
 // to EchoCancellation and not EchoControlMobile. It can be set in the
 // constructor or using AudioProcessing::SetExtraOptions().
-struct NextGenerationAec {
-  NextGenerationAec() : enabled(false) {}
-  explicit NextGenerationAec(bool enabled) : enabled(enabled) {}
-  static const ConfigOptionID identifier = ConfigOptionID::kNextGenerationAec;
+struct EchoCanceller3 {
+  EchoCanceller3() : enabled(false) {}
+  explicit EchoCanceller3(bool enabled) : enabled(enabled) {}
+  static const ConfigOptionID identifier = ConfigOptionID::kEchoCanceller3;
   bool enabled;
 };