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/video/stream_synchronization.cc b/video/stream_synchronization.cc
index f47037d..6b800d1 100644
--- a/video/stream_synchronization.cc
+++ b/video/stream_synchronization.cc
@@ -70,9 +70,9 @@
   assert(total_audio_delay_target_ms && total_video_delay_target_ms);
 
   int current_video_delay_ms = *total_video_delay_target_ms;
-  LOG(LS_VERBOSE) << "Audio delay: " << current_audio_delay_ms
-                  << " current diff: " << relative_delay_ms
-                  << " for stream " << audio_stream_id_;
+  RTC_LOG(LS_VERBOSE) << "Audio delay: " << current_audio_delay_ms
+                      << " current diff: " << relative_delay_ms
+                      << " for stream " << audio_stream_id_;
   // Calculate the difference between the lowest possible video delay and
   // the current audio delay.
   int current_diff_ms = current_video_delay_ms - current_audio_delay_ms +
@@ -165,10 +165,11 @@
   channel_delay_.last_video_delay_ms = new_video_delay_ms;
   channel_delay_.last_audio_delay_ms = new_audio_delay_ms;
 
-  LOG(LS_VERBOSE) << "Sync video delay " << new_video_delay_ms
-                  << " for video stream " << video_stream_id_
-                  << " and audio delay " << channel_delay_.extra_audio_delay_ms
-                  << " for audio stream " << audio_stream_id_;
+  RTC_LOG(LS_VERBOSE) << "Sync video delay " << new_video_delay_ms
+                      << " for video stream " << video_stream_id_
+                      << " and audio delay "
+                      << channel_delay_.extra_audio_delay_ms
+                      << " for audio stream " << audio_stream_id_;
 
   // Return values.
   *total_video_delay_target_ms = new_video_delay_ms;