Moved the functionality in aec_core_internal.h into other files

webrtc/modules/audio_processing/BUILD.gn

 # Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 import("//build/config/arm.gni")
 import("//third_party/protobuf/proto_library.gni")
 import("../../build/webrtc.gni")
 
 declare_args() {
   # Outputs some low-level debug files.
   aec_debug_dump = false
 
   # Disables the usual mode where we trust the reported system delay
   # values the AEC receives. The corresponding define is set appropriately
   # in the code, but it can be force-enabled here for testing.
   aec_untrusted_delay_for_testing = false
 }
 
 source_set("audio_processing") {
   sources = [
     "aec/aec_core.cc",
     "aec/aec_core.h",
-    "aec/aec_core_internal.h",
+    "aec/aec_core_optimized_methods.h",
     "aec/aec_rdft.cc",
     "aec/aec_rdft.h",
     "aec/aec_resampler.cc",
     "aec/aec_resampler.h",
     "aec/echo_cancellation.cc",
     "aec/echo_cancellation.h",
     "aecm/aecm_core.cc",
     "aecm/aecm_core.h",
     "aecm/echo_control_mobile.cc",
     "aecm/echo_control_mobile.h",
@@ skipping 254 matching lines @@
       "../../common_audio",
     ]
 
     if (aec_debug_dump) {
       defines = [ "WEBRTC_AEC_DEBUG_DUMP=1" ]
     } else {
       defines = [ "WEBRTC_AEC_DEBUG_DUMP=0" ]
     }
   }
 }