Bugfix to stop chrome from crashing.

talk/media/webrtc/webrtcvoiceengine.cc

Index: talk/media/webrtc/webrtcvoiceengine.cc
diff --git a/talk/media/webrtc/webrtcvoiceengine.cc b/talk/media/webrtc/webrtcvoiceengine.cc
index 46d780e3d9ecbcee7448b2bc70862d0ac8c41cb2..150042300de48cd572d46854784ba21550602a31 100644
--- a/talk/media/webrtc/webrtcvoiceengine.cc
+++ b/talk/media/webrtc/webrtcvoiceengine.cc
@@ -1153,12 +1153,22 @@ void WebRtcVoiceEngine::StopAecDump() {
 
 bool WebRtcVoiceEngine::StartRtcEventLog(rtc::PlatformFile file) {
   RTC_DCHECK(worker_thread_checker_.CalledOnValidThread());
-  return voe_wrapper_->codec()->GetEventLog()->StartLogging(file);
+  webrtc::RtcEventLog* event_log = voe_wrapper_->codec()->GetEventLog();
+  if (event_log) {
+    return event_log->StartLogging(file);
+  }
+  LOG_RTCERR0(StartRtcEventLog);
+  return false;
 }
 
 void WebRtcVoiceEngine::StopRtcEventLog() {
   RTC_DCHECK(worker_thread_checker_.CalledOnValidThread());
-  voe_wrapper_->codec()->GetEventLog()->StopLogging();
+  webrtc::RtcEventLog* event_log = voe_wrapper_->codec()->GetEventLog();
+  if (event_log) {
+    event_log->StopLogging();
+    return;
+  }
+  LOG_RTCERR0(StopRtcEventLog);
 }
 
 int WebRtcVoiceEngine::CreateVoEChannel() {