Track plugin input event latency

ppapi/shared_impl/ppb_input_event_shared.h

Index: ppapi/shared_impl/ppb_input_event_shared.h
diff --git a/ppapi/shared_impl/ppb_input_event_shared.h b/ppapi/shared_impl/ppb_input_event_shared.h
index ad467b4551c6f8c032573ff0421175b409f92fa7..ebfad8611d70a7e490603ace3535fee449f4dd42 100644
--- a/ppapi/shared_impl/ppb_input_event_shared.h
+++ b/ppapi/shared_impl/ppb_input_event_shared.h
@@ -13,6 +13,7 @@
 #include "ppapi/c/ppb_input_event.h"
 #include "ppapi/shared_impl/resource.h"
 #include "ppapi/thunk/ppb_input_event_api.h"
+#include "ui/events/latency_info.h"
 
 namespace ppapi {
 
@@ -56,6 +57,8 @@ struct PPAPI_SHARED_EXPORT InputEventData {
   std::vector<PP_TouchPoint> touches;
   std::vector<PP_TouchPoint> changed_touches;
   std::vector<PP_TouchPoint> target_touches;
+
+  ui::LatencyInfo latency_info;
 };
 
 // This simple class implements the PPB_InputEvent_API in terms of the
@@ -97,6 +100,7 @@ class PPAPI_SHARED_EXPORT PPB_InputEvent_Shared
                                         uint32_t index) OVERRIDE;
   virtual PP_TouchPoint GetTouchById(PP_TouchListType list,
                                      uint32_t id) OVERRIDE;
+  virtual PP_Bool TraceInputLatency(PP_Bool has_damage) OVERRIDE;
 
   // Implementations for event creation.
   static PP_Resource CreateIMEInputEvent(ResourceObjectType type,