Introduce RtcEvent and subclasses

webrtc/logging/rtc_event_log/events/rtc_event_probe_result_failure.cc

Index: webrtc/logging/rtc_event_log/events/rtc_event_probe_result_failure.cc
diff --git a/webrtc/logging/rtc_event_log/events/rtc_event_probe_result_failure.cc b/webrtc/logging/rtc_event_log/events/rtc_event_probe_result_failure.cc
new file mode 100644
index 0000000000000000000000000000000000000000..427865c80618848df895084afb2d86b256dae511
--- /dev/null
+++ b/webrtc/logging/rtc_event_log/events/rtc_event_probe_result_failure.cc
@@ -0,0 +1,23 @@
+/*
+ *  Copyright (c) 2017 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.
+ */
+
+#include "webrtc/logging/rtc_event_log/events/rtc_event_probe_result_failure.h"
+
+namespace webrtc {
+
+RtcEvent::Type RtcEventProbeResultFailure::GetType() const {
+  return RtcEvent::Type::ProbeResultFailure;
+}
+
+bool RtcEventProbeResultFailure::IsConfigEvent() const {
+  return false;
+}
+
+}  // namespace webrtc