Move the aec_rdft* files to a more proper place beneath APM and make them thread-safe.

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 1f3077c87983d514aa411bd31c97feadf1eeea59..9c1a3fff5c81208058da8990e2acc3bddfdbd09c 100644
--- a/webrtc/modules/audio_processing/aec/aec_core.h
+++ b/webrtc/modules/audio_processing/aec/aec_core.h
@@ -26,6 +26,7 @@ extern "C" {
 #include "webrtc/common_audio/wav_file.h"
 #include "webrtc/modules/audio_processing/aec/aec_common.h"
 #include "webrtc/modules/audio_processing/utility/block_mean_calculator.h"
+#include "webrtc/modules/audio_processing//utility/ooura_fft.h"

[hlundin-webrtc, 2016/10/05 12:54:53]

Double //

[peah-webrtc, 2016/10/06 06:23:39]

Done.

 #include "webrtc/typedefs.h"
 
 namespace webrtc {
@@ -134,6 +135,7 @@ struct AecCore {
   ~AecCore();
 
   std::unique_ptr<ApmDataDumper> data_dumper;
+  const OouraFft ooura_fft;
 
   CoherenceState coherence_state;