Clean up LatencyInfo and RWHLatencyTracker.

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 <stdint.h>
 
 #include <memory>
@@ skipping 68 matching lines @@
   // Timestamp of when the browser process receives a buffer swap notification
   // from the renderer.
   INPUT_EVENT_BROWSER_RECEIVED_RENDERER_SWAP_COMPONENT,
   // Timestamp of when the gpu service began swap buffers, unlike
   // INPUT_EVENT_LATENCY_TERMINATED_FRAME_SWAP_COMPONENT which measures after.
   INPUT_EVENT_GPU_SWAP_BUFFER_COMPONENT,
   // Timestamp of when the gesture scroll update is generated from a mouse wheel
   // event.
   INPUT_EVENT_LATENCY_GENERATE_SCROLL_UPDATE_FROM_MOUSE_WHEEL,
   // ---------------------------TERMINAL COMPONENT-----------------------------
-  // TERMINAL COMPONENT is when we show the latency end in chrome://tracing.
-  // Timestamp when the mouse event is acked from renderer and it does not
-  // cause any rendering scheduled.
-  INPUT_EVENT_LATENCY_TERMINATED_MOUSE_COMPONENT,
-  // Timestamp when the mouse wheel event is acked from renderer and it does not
-  // cause any rendering scheduled.
-  INPUT_EVENT_LATENCY_TERMINATED_MOUSE_WHEEL_COMPONENT,
-  // Timestamp when the keyboard event is acked from renderer and it does not
-  // cause any rendering scheduled.
-  INPUT_EVENT_LATENCY_TERMINATED_KEYBOARD_COMPONENT,
-  // Timestamp when the touch event is acked from renderer and it does not
-  // cause any rendering scheduled and does not generate any gesture event.
-  INPUT_EVENT_LATENCY_TERMINATED_TOUCH_COMPONENT,
-  // Timestamp when the gesture event is acked from renderer, and it does not
-  // cause any rendering scheduled.
-  INPUT_EVENT_LATENCY_TERMINATED_GESTURE_COMPONENT,
+  // Timestamp when the event is acked from renderer when it does not
+  // cause any rendering to be scheduled.
+  INPUT_EVENT_LATENCY_TERMINATED_COMPONENT,

[dtapuska, 2016/12/15 14:54:49]

Can we be a little more detailed what the reason behind the termination was?
ie; NO_SWAP or something?

[tdresser, 2016/12/15 15:26:37]

Done.

   // Timestamp when the frame is swapped (i.e. when the rendering caused by
   // input event actually takes effect).
   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 commit to be scheduled
   // but the commit was aborted since it carried no new information.
   INPUT_EVENT_LATENCY_TERMINATED_COMMIT_NO_UPDATE_COMPONENT,
   // This component indicates that the input causes a swap to be scheduled
@@ skipping 151 matching lines @@
 #if !defined(OS_IOS)
   friend struct IPC::ParamTraits<ui::LatencyInfo>;
   friend struct mojo::StructTraits<ui::mojom::LatencyInfoDataView,
                                    ui::LatencyInfo>;
 #endif
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_LATENCY_INFO_H_