Track plugin input event latency

ui/events/latency_info.h

 // Copyright 2013 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.
 
 #ifndef UI_EVENTS_LATENCY_INFO_H_
 #define UI_EVENTS_LATENCY_INFO_H_
 
 #include <utility>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/containers/small_map.h"
 #include "base/time/time.h"
 #include "ui/events/events_base_export.h"
 
 namespace ui {
 
 enum LatencyComponentType {
   // ---------------------------BEGIN COMPONENT-------------------------------
   // BEGIN COMPONENT is when we show the latency begin in chrome://tracing.
   // Timestamp when the input event is sent from RenderWidgetHost to renderer.
   INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
+  // Timestamp when the input event is received in plugin.
+  INPUT_EVENT_LATENCY_BEGIN_PLUGIN_COMPONENT,
   // ---------------------------NORMAL COMPONENT-------------------------------
   // Timestamp when the scroll update gesture event is sent from RWH to
   // renderer. In Aura, touch event's LatencyInfo is carried over to the gesture
   // event. So gesture event's INPUT_EVENT_LATENCY_RWH_COMPONENT is the
   // timestamp when its original touch events is sent from RWH to renderer.
   // In non-aura platform, INPUT_EVENT_LATENCY_SCROLL_UPDATE_RWH_COMPONENT
   // is the same as INPUT_EVENT_LATENCY_RWH_COMPONENT.
   INPUT_EVENT_LATENCY_SCROLL_UPDATE_RWH_COMPONENT,
   // The original timestamp of the touch event which converts to scroll update.
   INPUT_EVENT_LATENCY_SCROLL_UPDATE_ORIGINAL_COMPONENT,
@@ skipping 25 matching lines @@
   INPUT_EVENT_LATENCY_TERMINATED_FRAME_SWAP_COMPONENT,
   // This component indicates that the input causes a commit to be scheduled
   // but the commit failed.
   INPUT_EVENT_LATENCY_TERMINATED_COMMIT_FAILED_COMPONENT,
   // This component indicates that the input causes a swap to be scheduled
   // but the swap failed.
   INPUT_EVENT_LATENCY_TERMINATED_SWAP_FAILED_COMPONENT,
   // This component indicates that the cached LatencyInfo number exceeds the
   // maximal allowed size.
   LATENCY_INFO_LIST_TERMINATED_OVERFLOW_COMPONENT,
-  LATENCY_COMPONENT_TYPE_LAST = LATENCY_INFO_LIST_TERMINATED_OVERFLOW_COMPONENT
+  // Timestamp when the input event is considered not cause any rendering
+  // damage in plugin and thus terminated.
+  INPUT_EVENT_LATENCY_TERMINATED_PLUGIN_COMPONENT,
+  LATENCY_COMPONENT_TYPE_LAST = INPUT_EVENT_LATENCY_TERMINATED_PLUGIN_COMPONENT
 };
 
 struct EVENTS_BASE_EXPORT LatencyInfo {
   struct LatencyComponent {
     // Nondecreasing number that can be used to determine what events happened
     // in the component at the time this struct was sent on to the next
     // component.
     int64 sequence_number;
     // Average time of events that happened in this component.
     base::TimeTicks event_time;
@@ skipping 61 matching lines @@
   LatencyMap latency_components;
   // The unique id for matching the ASYNC_BEGIN/END trace event.
   int64 trace_id;
   // Whether a terminal component has been added.
   bool terminated;
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_LATENCY_INFO_H_