Added functions on libjingle API to start and stop the recording of an RtcEventLog.

talk/session/media/channelmanager.cc

Index: talk/session/media/channelmanager.cc
diff --git a/talk/session/media/channelmanager.cc b/talk/session/media/channelmanager.cc
index 5930dfd75aa3af16db2fc74fbcd3e52bf8442da4..5caf3c4b575e4e03978ee1ab10f4530f638bdf0d 100644
--- a/talk/session/media/channelmanager.cc
+++ b/talk/session/media/channelmanager.cc
@@ -630,4 +630,14 @@ bool ChannelManager::StartAecDump(rtc::PlatformFile file) {
       Bind(&MediaEngineInterface::StartAecDump, media_engine_.get(), file));
 }
 
+bool ChannelManager::StartRtcEventLog(rtc::PlatformFile file) {
+  return worker_thread_->Invoke<bool>(
+      Bind(&MediaEngineInterface::StartRtcEventLog, media_engine_.get(), file));
+}
+
+void ChannelManager::StopRtcEventLog() {
+  worker_thread_->Invoke<void>(
+      Bind(&MediaEngineInterface::StopRtcEventLog, media_engine_.get()));
+}
+
 }  // namespace cricket