Enable cpplint and fix cpplint errors in webrtc/*audio

webrtc/common_audio/signal_processing/resample_by_2_internal.h

Index: webrtc/common_audio/signal_processing/resample_by_2_internal.h
diff --git a/webrtc/common_audio/signal_processing/resample_by_2_internal.h b/webrtc/common_audio/signal_processing/resample_by_2_internal.h
index 5c9533eefa36f248530a46703c6f3f7cbf61d43e..d0954e59448a132f94c8ea35184377ae117cdec7 100644
--- a/webrtc/common_audio/signal_processing/resample_by_2_internal.h
+++ b/webrtc/common_audio/signal_processing/resample_by_2_internal.h
@@ -14,8 +14,8 @@
  *
  */
 
-#ifndef WEBRTC_SPL_RESAMPLE_BY_2_INTERNAL_H_
-#define WEBRTC_SPL_RESAMPLE_BY_2_INTERNAL_H_
+#ifndef WEBRTC_COMMON_AUDIO_SIGNAL_PROCESSING_RESAMPLE_BY_2_INTERNAL_H_
+#define WEBRTC_COMMON_AUDIO_SIGNAL_PROCESSING_RESAMPLE_BY_2_INTERNAL_H_
 
 #include "webrtc/typedefs.h"
 
@@ -44,4 +44,4 @@ void WebRtcSpl_LPBy2ShortToInt(const int16_t* in, int32_t len,
 void WebRtcSpl_LPBy2IntToInt(const int32_t* in, int32_t len, int32_t* out,
                              int32_t* state);
 
-#endif // WEBRTC_SPL_RESAMPLE_BY_2_INTERNAL_H_
+#endif  // WEBRTC_COMMON_AUDIO_SIGNAL_PROCESSING_RESAMPLE_BY_2_INTERNAL_H_