Stop using LOG macros in favor of RTC_ prefixed macros.

This CL has been generated with the following script:

for m in PLOG \
  LOG_TAG \
  LOG_GLEM \
  LOG_GLE_EX \
  LOG_GLE \
  LAST_SYSTEM_ERROR \
  LOG_ERRNO_EX \
  LOG_ERRNO \
  LOG_ERR_EX \
  LOG_ERR \
  LOG_V \
  LOG_F \
  LOG_T_F \
  LOG_E \
  LOG_T \
  LOG_CHECK_LEVEL_V \
  LOG_CHECK_LEVEL \
  LOG
do
  git grep -l $m | xargs sed -i "s,\b$m\b,RTC_$m,g"
done
git checkout rtc_base/logging.h
git cl format

Bug: webrtc:8452
Change-Id: I1a53ef3e0a5ef6e244e62b2e012b864914784600
Reviewed-on: https://webrtc-review.googlesource.com/21325
Reviewed-by: Niels Moller <nisse@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20617}
diff --git a/modules/audio_coding/neteq/dtmf_buffer.cc b/modules/audio_coding/neteq/dtmf_buffer.cc
index b06de5e..370de42 100644
--- a/modules/audio_coding/neteq/dtmf_buffer.cc
+++ b/modules/audio_coding/neteq/dtmf_buffer.cc
@@ -73,7 +73,7 @@
   RTC_CHECK(payload);
   RTC_CHECK(event);
   if (payload_length_bytes < 4) {
-    LOG(LS_WARNING) << "ParseEvent payload too short";
+    RTC_LOG(LS_WARNING) << "ParseEvent payload too short";
     return kPayloadTooShort;
   }
 
@@ -101,7 +101,7 @@
   if (event.event_no < 0 || event.event_no > 15 ||
       event.volume < 0 || event.volume > 63 ||
       event.duration <= 0 || event.duration > 65535) {
-    LOG(LS_WARNING) << "InsertEvent invalid parameters";
+    RTC_LOG(LS_WARNING) << "InsertEvent invalid parameters";
     return kInvalidEventParameters;
   }
   DtmfList::iterator it = buffer_.begin();