Remove MPArch.IIR_InputEventDelta

content/browser/renderer_host/input/input_router_impl.h

Index: content/browser/renderer_host/input/input_router_impl.h
diff --git a/content/browser/renderer_host/input/input_router_impl.h b/content/browser/renderer_host/input/input_router_impl.h
index d3bcf65764084f76d02b74fc485c53709e32ec06..b2b2a06b3c5d42de6e6c2e71f4552ce20c367b7d 100644
--- a/content/browser/renderer_host/input/input_router_impl.h
+++ b/content/browser/renderer_host/input/input_router_impl.h
@@ -230,9 +230,6 @@ class CONTENT_EXPORT InputRouterImpl
   typedef std::deque<NativeWebKeyboardEventWithLatencyInfo> KeyQueue;
   KeyQueue key_queue_;
 
-  // The time when an input event was sent to the client.
-  base::TimeTicks input_event_start_time_;
-
   // The source of the ack within the scope of |ProcessInputEventAck()|.
   // Defaults to ACK_SOURCE_NONE.
   AckSource current_ack_source_;