Add latency measurement system

content/browser/browser_plugin/browser_plugin_guest.cc

Index: content/browser/browser_plugin/browser_plugin_guest.cc
diff --git a/content/browser/browser_plugin/browser_plugin_guest.cc b/content/browser/browser_plugin/browser_plugin_guest.cc
index 5ade88315c61ee8c0fa57b4c45f64bae7957d704..214c3f12aac1c096f2eab698c87bdb61314b0312 100644
--- a/content/browser/browser_plugin/browser_plugin_guest.cc
+++ b/content/browser/browser_plugin/browser_plugin_guest.cc
@@ -419,9 +419,9 @@ void BrowserPluginGuest::OnHandleInputEvent(
     WebKit::WebKeyboardEvent key_event;
     memcpy(&key_event, event, event->size);
     key_event.type = WebKit::WebInputEvent::RawKeyDown;
-    message = new ViewMsg_HandleInputEvent(routing_id(), &key_event, false);
+    message = new ViewMsg_HandleInputEvent(routing_id(), 0, &key_event, false);
   } else {
-    message = new ViewMsg_HandleInputEvent(routing_id(), event, false);
+    message = new ViewMsg_HandleInputEvent(routing_id(), 0, event, false);
   }
 
   guest_rvh->Send(message);