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/rtc_base/messagequeue.cc b/rtc_base/messagequeue.cc
index f863d0c..001d3ed 100644
--- a/rtc_base/messagequeue.cc
+++ b/rtc_base/messagequeue.cc
@@ -320,8 +320,9 @@
       if (pmsg->ts_sensitive) {
         int64_t delay = TimeDiff(msCurrent, pmsg->ts_sensitive);
         if (delay > 0) {
-          LOG_F(LS_WARNING) << "id: " << pmsg->message_id << "  delay: "
-                            << (delay + kMaxMsgLatency) << "ms";
+          RTC_LOG_F(LS_WARNING)
+              << "id: " << pmsg->message_id
+              << "  delay: " << (delay + kMaxMsgLatency) << "ms";
         }
       }
       // If this was a dispose message, delete it and skip it.
@@ -531,8 +532,9 @@
   int64_t end_time = TimeMillis();
   int64_t diff = TimeDiff(end_time, start_time);
   if (diff >= kSlowDispatchLoggingThreshold) {
-    LOG(LS_INFO) << "Message took " << diff << "ms to dispatch. Posted from: "
-                 << pmsg->posted_from.ToString();
+    RTC_LOG(LS_INFO) << "Message took " << diff
+                     << "ms to dispatch. Posted from: "
+                     << pmsg->posted_from.ToString();
   }
 }