Revert "Update includes for webrtc/{base => rtc_base} rename (1/3)"

webrtc/modules/audio_coding/codecs/pcm16b/audio_encoder_pcm16b.cc

Index: webrtc/modules/audio_coding/codecs/pcm16b/audio_encoder_pcm16b.cc
diff --git a/webrtc/modules/audio_coding/codecs/pcm16b/audio_encoder_pcm16b.cc b/webrtc/modules/audio_coding/codecs/pcm16b/audio_encoder_pcm16b.cc
index 897eed23f421f2863aa73152c72cd4ede9fb2b37..f57cc7ebdcb304f776e1139ab1c2a7e74b4b0bf2 100644
--- a/webrtc/modules/audio_coding/codecs/pcm16b/audio_encoder_pcm16b.cc
+++ b/webrtc/modules/audio_coding/codecs/pcm16b/audio_encoder_pcm16b.cc
@@ -12,11 +12,11 @@
 
 #include <algorithm>
 
+#include "webrtc/base/checks.h"
+#include "webrtc/base/safe_conversions.h"
+#include "webrtc/base/string_to_number.h"
 #include "webrtc/common_types.h"
 #include "webrtc/modules/audio_coding/codecs/pcm16b/pcm16b.h"
-#include "webrtc/rtc_base/checks.h"
-#include "webrtc/rtc_base/safe_conversions.h"
-#include "webrtc/rtc_base/string_to_number.h"
 
 namespace webrtc {