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/cpu_time.cc b/rtc_base/cpu_time.cc
index 3819e52..6c22880 100644
--- a/rtc_base/cpu_time.cc
+++ b/rtc_base/cpu_time.cc
@@ -41,7 +41,7 @@
   if (clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &ts) == 0) {
     return ts.tv_sec * kNumNanosecsPerSec + ts.tv_nsec;
   } else {
-    LOG_ERR(LS_ERROR) << "clock_gettime() failed.";
+    RTC_LOG_ERR(LS_ERROR) << "clock_gettime() failed.";
   }
 #elif defined(WEBRTC_MAC)
   struct rusage rusage;
@@ -49,7 +49,7 @@
     return rusage.ru_utime.tv_sec * kNumNanosecsPerSec +
            rusage.ru_utime.tv_usec * kNumNanosecsPerMicrosec;
   } else {
-    LOG_ERR(LS_ERROR) << "getrusage() failed.";
+    RTC_LOG_ERR(LS_ERROR) << "getrusage() failed.";
   }
 #elif defined(WEBRTC_WIN)
   FILETIME createTime;
@@ -62,7 +62,7 @@
             userTime.dwLowDateTime) *
            kNanosecsPerFiletime;
   } else {
-    LOG_ERR(LS_ERROR) << "GetProcessTimes() failed.";
+    RTC_LOG_ERR(LS_ERROR) << "GetProcessTimes() failed.";
   }
 #else
   // Not implemented yet.
@@ -78,7 +78,7 @@
   if (clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts) == 0) {
     return ts.tv_sec * kNumNanosecsPerSec + ts.tv_nsec;
   } else {
-    LOG_ERR(LS_ERROR) << "clock_gettime() failed.";
+    RTC_LOG_ERR(LS_ERROR) << "clock_gettime() failed.";
   }
 #elif defined(WEBRTC_MAC)
   thread_basic_info_data_t info;
@@ -88,7 +88,7 @@
     return info.user_time.seconds * kNumNanosecsPerSec +
            info.user_time.microseconds * kNumNanosecsPerMicrosec;
   } else {
-    LOG_ERR(LS_ERROR) << "thread_info() failed.";
+    RTC_LOG_ERR(LS_ERROR) << "thread_info() failed.";
   }
 #elif defined(WEBRTC_WIN)
   FILETIME createTime;
@@ -101,7 +101,7 @@
             userTime.dwLowDateTime) *
            kNanosecsPerFiletime;
   } else {
-    LOG_ERR(LS_ERROR) << "GetThreadTimes() failed.";
+    RTC_LOG_ERR(LS_ERROR) << "GetThreadTimes() failed.";
   }
 #else
   // Not implemented yet.