Send input event's LatencyInfo back from renderer to browser when acked

content/renderer/render_widget.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/render_widget.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
@@ skipping 838 matching lines @@
       INPUT_EVENT_ACK_STATE_CONSUMED : INPUT_EVENT_ACK_STATE_NOT_CONSUMED;
   if (!processed &&  input_event->type == WebInputEvent::TouchStart) {
     const WebTouchEvent& touch_event =
         *static_cast<const WebTouchEvent*>(input_event);
     ack_result = HasTouchEventHandlersAt(touch_event.touches[0].position) ?
         INPUT_EVENT_ACK_STATE_NOT_CONSUMED :
         INPUT_EVENT_ACK_STATE_NO_CONSUMER_EXISTS;
   }
 
   IPC::Message* response =
-      new InputHostMsg_HandleInputEvent_ACK(routing_id_, input_event->type,
-                                                ack_result);
+      new InputHostMsg_HandleInputEvent_ACK(routing_id_,
+                                            input_event->type,
+                                            ack_result,
+                                            latency_info);
   bool event_type_gets_rate_limited =
       input_event->type == WebInputEvent::MouseMove ||
       input_event->type == WebInputEvent::MouseWheel ||
       WebInputEvent::isTouchEventType(input_event->type);
 
   bool frame_pending = paint_aggregator_.HasPendingUpdate();
   if (is_accelerated_compositing_active_) {
     frame_pending = compositor_ &&
                     compositor_->commitRequested();
   }
@@ skipping 1612 matching lines @@
 
   if (!context->InitializeWithDefaultBufferSizes(
           attributes,
           false /* bind generates resources */,
           CAUSE_FOR_GPU_LAUNCH_WEBGRAPHICSCONTEXT3DCOMMANDBUFFERIMPL_INITIALIZE))
     return NULL;
   return context.release();
 }
 
 }  // namespace content