support multiple log message handlers in base/logging.h

remoting/client/plugin/chromoting_instance.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "remoting/client/plugin/chromoting_instance.h"
 
 #include <nacl_io/nacl_io.h>
 #include <sys/mount.h>
 
 #include <string>
@@ skipping 1025 matching lines @@
   data->SetDouble("maxRoundtripLatency", perf_tracker_.round_trip_ms().Max());
   PostLegacyJsonMessage("onPerfStats", std::move(data));
 }
 
 // static
 void ChromotingInstance::RegisterLogMessageHandler() {
   base::AutoLock lock(g_logging_lock.Get());
 
   // Set up log message handler.
   // This is not thread-safe so we need it within our lock.
-  logging::SetLogMessageHandler(&LogToUI);
+  logging::AddLogMessageHandler(&LogToUI);
 }
 
 void ChromotingInstance::RegisterLoggingInstance() {
   base::AutoLock lock(g_logging_lock.Get());
   g_logging_instance = pp_instance();
 }
 
 void ChromotingInstance::UnregisterLoggingInstance() {
   base::AutoLock lock(g_logging_lock.Get());
 
   // Don't unregister unless we're the currently registered instance.
   if (pp_instance() != g_logging_instance)
     return;
 
   // Unregister this instance for logging.
   g_logging_instance = 0;
 }
 
 // static
-bool ChromotingInstance::LogToUI(int severity, const char* file, int line,
-                                 size_t message_start,
-                                 const std::string& str) {
+bool ChromotingInstance::LogToUI(int severity, const std::string& file,
+                                 int line, const std::string& str) {
   PP_LogLevel log_level = PP_LOGLEVEL_ERROR;
   switch (severity) {
     case logging::LOG_INFO:
       log_level = PP_LOGLEVEL_TIP;
       break;
     case logging::LOG_WARNING:
       log_level = PP_LOGLEVEL_WARNING;
       break;
     case logging::LOG_ERROR:
     case logging::LOG_FATAL:
@@ skipping 48 matching lines @@
   if (is_custom_counts_histogram) {
     uma.HistogramCustomCounts(histogram_name, value, histogram_min,
                               histogram_max, histogram_buckets);
   } else {
     uma.HistogramCustomTimes(histogram_name, value, histogram_min,
                              histogram_max, histogram_buckets);
   }
 }
 
 }  // namespace remoting