Track plugin input event latency

ppapi/proxy/ppb_instance_proxy.cc

Index: ppapi/proxy/ppb_instance_proxy.cc
diff --git a/ppapi/proxy/ppb_instance_proxy.cc b/ppapi/proxy/ppb_instance_proxy.cc
index 85f1f1621005bf140711c570c2e8fd7b466cf345..93e6660a694970c443c404a73aeea8e89d9eddb4 100644
--- a/ppapi/proxy/ppb_instance_proxy.cc
+++ b/ppapi/proxy/ppb_instance_proxy.cc
@@ -145,6 +145,8 @@ bool PPB_Instance_Proxy::OnMessageReceived(const IPC::Message& msg) {
                         OnHostMsgRequestInputEvents)
     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_ClearInputEvents,
                         OnHostMsgClearInputEvents)
+    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_StartTrackingLatency,
+                        OnHostMsgStartTrackingLatency)
     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_LockMouse,
                         OnHostMsgLockMouse)
     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_UnlockMouse,
@@ -480,6 +482,11 @@ void PPB_Instance_Proxy::ClearInputEventRequest(PP_Instance instance,
       API_ID_PPB_INSTANCE, instance, event_classes));
 }
 
+void PPB_Instance_Proxy::StartTrackingLatency(PP_Instance instance) {
+  dispatcher()->Send(new PpapiHostMsg_PPBInstance_StartTrackingLatency(
+      API_ID_PPB_INSTANCE, instance));
+}
+
 void PPB_Instance_Proxy::ZoomChanged(PP_Instance instance,
                                      double factor) {
   // Not proxied yet.
@@ -1004,6 +1011,12 @@ void PPB_Instance_Proxy::OnHostMsgClearInputEvents(PP_Instance instance,
     enter.functions()->ClearInputEventRequest(instance, event_classes);
 }
 
+void PPB_Instance_Proxy::OnHostMsgStartTrackingLatency(PP_Instance instance) {
+  EnterInstanceNoLock enter(instance);
+  if (enter.succeeded())
+    enter.functions()->StartTrackingLatency(instance);
+}
+
 void PPB_Instance_Proxy::OnHostMsgPostMessage(
     PP_Instance instance,
     SerializedVarReceiveInput message) {