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/logging_unittest.cc b/rtc_base/logging_unittest.cc
index cd5cafe..a2d35fd 100644
--- a/rtc_base/logging_unittest.cc
+++ b/rtc_base/logging_unittest.cc
@@ -44,8 +44,8 @@
   LogMessage::AddLogToStream(&stream, LS_INFO);
   EXPECT_EQ(LS_INFO, LogMessage::GetLogToStream(&stream));
 
-  LOG(LS_INFO) << "INFO";
-  LOG(LS_VERBOSE) << "VERBOSE";
+  RTC_LOG(LS_INFO) << "INFO";
+  RTC_LOG(LS_VERBOSE) << "VERBOSE";
   EXPECT_NE(std::string::npos, str.find("INFO"));
   EXPECT_EQ(std::string::npos, str.find("VERBOSE"));
 
@@ -68,8 +68,8 @@
   EXPECT_EQ(LS_INFO, LogMessage::GetLogToStream(&stream1));
   EXPECT_EQ(LS_VERBOSE, LogMessage::GetLogToStream(&stream2));
 
-  LOG(LS_INFO) << "INFO";
-  LOG(LS_VERBOSE) << "VERBOSE";
+  RTC_LOG(LS_INFO) << "INFO";
+  RTC_LOG(LS_VERBOSE) << "VERBOSE";
 
   EXPECT_NE(std::string::npos, str1.find("INFO"));
   EXPECT_EQ(std::string::npos, str1.find("VERBOSE"));
@@ -97,7 +97,7 @@
  private:
   void Run() override {
     // LS_SENSITIVE to avoid cluttering up any real logging going on
-    LOG(LS_SENSITIVE) << "LOG";
+    RTC_LOG(LS_SENSITIVE) << "RTC_LOG";
   }
 };
 
@@ -149,7 +149,7 @@
   int64_t start = TimeMillis(), finish;
   std::string message('X', 80);
   for (int i = 0; i < 1000; ++i) {
-    LOG(LS_SENSITIVE) << message;
+    RTC_LOG(LS_SENSITIVE) << message;
   }
   finish = TimeMillis();
 
@@ -157,7 +157,7 @@
   stream.Close();
   webrtc::test::RemoveFile(path);
 
-  LOG(LS_INFO) << "Average log time: " << TimeDiff(finish, start) << " ms";
+  RTC_LOG(LS_INFO) << "Average log time: " << TimeDiff(finish, start) << " ms";
 }
 
 }  // namespace rtc