Add shouldDisableBuffering to RTCFileLogger.

talk/app/webrtc/objc/RTCFileLogger.mm

 /*
  * libjingle
  * Copyright 2015 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 28 matching lines @@
 
 @implementation RTCFileLogger {
   BOOL _hasStarted;
   NSString *_dirPath;
   NSUInteger _maxFileSize;
   rtc::scoped_ptr<rtc::FileRotatingLogSink> _logSink;
 }
 
 @synthesize severity = _severity;
 @synthesize rotationType = _rotationType;
+@synthesize shouldDisableBuffering = _shouldDisableBuffering;
 
 - (instancetype)init {
   NSArray *paths = NSSearchPathForDirectoriesInDomains(
       NSDocumentDirectory, NSUserDomainMask, YES);
   NSString *documentsDirPath = [paths firstObject];
   NSString *defaultDirPath =
       [documentsDirPath stringByAppendingPathComponent:kDefaultLogDirName];
   return [self initWithDirPath:defaultDirPath
                    maxFileSize:kDefaultMaxFileSize];
 }
@@ skipping 55 matching lines @@
           new rtc::CallSessionFileRotatingLogSink(_dirPath.UTF8String,
                                                   _maxFileSize));
       break;
   }
   if (!_logSink->Init()) {
     LOG(LS_ERROR) << "Failed to open log files at path: "
                   << _dirPath.UTF8String;
     _logSink.reset();
     return;
   }
+  if (_shouldDisableBuffering) {
+    _logSink->DisableBuffering();
+  }
   rtc::LogMessage::LogThreads(true);
   rtc::LogMessage::LogTimestamps(true);
   rtc::LogMessage::AddLogToStream(_logSink.get(), [self rtcSeverity]);
   _hasStarted = YES;
 }
 
 - (void)stop {
   if (!_hasStarted) {
     return;
   }
@@ skipping 45 matching lines @@
     case kRTCFileLoggerSeverityInfo:
       return rtc::LS_INFO;
     case kRTCFileLoggerSeverityWarning:
       return rtc::LS_WARNING;
     case kRTCFileLoggerSeverityError:
       return rtc::LS_ERROR;
   }
 }
 
 @end