Enable BWE logging to command line when rtc_enable_bwe_test_logging is set to true

webrtc/modules/remote_bitrate_estimator/test/bwe_test_logging.cc

 /*
  *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 73 matching lines @@
     printf("%s\t", state.tag.c_str());
     va_list args;
     va_start(args, format);
     vprintf(format, args);
     va_end(args);
     printf("\n");
   }
 }
 
 void Logging::Plot(int figure, double value) {
-  Plot(figure, value, "-");
+  Plot(figure, value, 0, "-");
+}
+
+void Logging::Plot(int figure, double value, uint32_t ssrc) {
+  Plot(figure, value, ssrc, "-");
 }
 
 void Logging::Plot(int figure, double value, const std::string& alg_name) {
+  Plot(figure, value, 0, alg_name);
+}
+
+void Logging::Plot(int figure,
+                   double value,
+                   uint32_t ssrc,
+                   const std::string& alg_name) {
   CriticalSectionScoped cs(crit_sect_.get());
   ThreadMap::iterator it = thread_map_.find(rtc::CurrentThreadId());
   assert(it != thread_map_.end());
   const State& state = it->second.stack.top();
-  std::string label = state.tag + '@' + alg_name;
+  std::stringstream ss;
+  ss << ssrc;
+  std::string label = state.tag + ':' + ss.str() + '@' + alg_name;
   std::string prefix("Available");
   if (alg_name.compare(0, prefix.length(), prefix) == 0) {
     std::string receiver("Receiver");
     size_t start_pos = label.find(receiver);
     if (start_pos != std::string::npos) {
       label.replace(start_pos, receiver.length(), "Sender");
     }
   }
   if (state.enabled) {
     printf("PLOT\t%d\t%s\t%f\t%f\n", figure, label.c_str(),
@@ skipping 128 matching lines @@
     // Update time so that next log/plot will use the latest time seen so far
     // in this call tree.
     state->timestamp_ms = std::max(state->timestamp_ms, newest_timestamp_ms);
   }
 }
 }  // namespace bwe
 }  // namespace testing
 }  // namespace webrtc
 
 #endif  // BWE_TEST_LOGGING_COMPILE_TIME_ENABLE