Add Keyboard Latency UMA Metrics.

content/browser/renderer_host/render_widget_host_impl.h

 // 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.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 133 matching lines @@
   cc::FrameSinkId AllocateFrameSinkId(bool is_guest_view_hack);
 
   // RenderWidgetHost implementation.
   void UpdateTextDirection(blink::WebTextDirection direction) override;
   void NotifyTextDirection() override;
   void Focus() override;
   void Blur() override;
   void SetActive(bool active) override;
   void ForwardMouseEvent(const blink::WebMouseEvent& mouse_event) override;
   void ForwardWheelEvent(const blink::WebMouseWheelEvent& wheel_event) override;
-  void ForwardKeyboardEvent(const NativeWebKeyboardEvent& key_event) override;
+  void ForwardKeyboardEventWithLatencyInfo(
+      const NativeWebKeyboardEvent& key_event,
+      const ui::LatencyInfo& ui_latency) override;
   void ForwardGestureEvent(
       const blink::WebGestureEvent& gesture_event) override;
   RenderProcessHost* GetProcess() const override;
   int GetRoutingID() const override;
   RenderWidgetHostViewBase* GetView() const override;
   bool IsLoading() const override;
   void RestartHangMonitorTimeoutIfNecessary() override;
   void SetIgnoreInputEvents(bool ignore_input_events) override;
   void WasResized() override;
   void AddKeyPressEventCallback(const KeyPressEventCallback& callback) override;
@@ skipping 168 matching lines @@
   // |next_source_id| to be discarded.
   void StartNewContentRenderingTimeout(uint32_t next_source_id);
 
   // Forwards the keyboard event with optional commands to the renderer. If
   // |key_event| is not forwarded for any reason, then |commands| are ignored.
   // |update_event| (if non-null) is set to indicate whether the underlying
   // event in |key_event| should be updated. |update_event| is only used on
   // aura.
   void ForwardKeyboardEventWithCommands(
       const NativeWebKeyboardEvent& key_event,
+      const ui::LatencyInfo& ui_latency,

[mfomitchev, 2017/04/04 14:59:06]

nit: var name is just "latency" or "latency_info" everywhere else.

[tdresser, 2017/05/01 15:49:21]

Done.

       const std::vector<EditCommand>* commands,
       bool* update_event = nullptr);
 
   // Forwards the given message to the renderer. These are called by the view
   // when it has received a message.
   void ForwardGestureEventWithLatencyInfo(
       const blink::WebGestureEvent& gesture_event,
       const ui::LatencyInfo& ui_latency) override;
   virtual void ForwardTouchEventWithLatencyInfo(
       const blink::WebTouchEvent& touch_event,
@@ skipping 589 matching lines @@
   uint32_t last_compositor_frame_sink_id_ = 0;
 
   base::WeakPtrFactory<RenderWidgetHostImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_