Track plugin input event latency

mojo/examples/pepper_container_app/plugin_instance.cc

Index: mojo/examples/pepper_container_app/plugin_instance.cc
diff --git a/mojo/examples/pepper_container_app/plugin_instance.cc b/mojo/examples/pepper_container_app/plugin_instance.cc
index cb392402efc0c2ac8858e15445ff13bfba821037..d4b79625afa59592d76a3115c791ed7f4247f99e 100644
--- a/mojo/examples/pepper_container_app/plugin_instance.cc
+++ b/mojo/examples/pepper_container_app/plugin_instance.cc
@@ -218,6 +218,10 @@ void PluginInstance::ClearInputEventRequest(PP_Instance instance,
   NOTIMPLEMENTED();
 }
 
+void PluginInstance::StartTrackingLatency(PP_Instance instance) {
+  NOTIMPLEMENTED();
+}
+
 void PluginInstance::PostMessage(PP_Instance instance, PP_Var message) {
   NOTIMPLEMENTED();
 }