Add Keyboard Latency UMA Metrics.

content/public/browser/render_widget_host.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_PUBLIC_BROWSER_RENDER_WIDGET_HOST_H_
 #define CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_H_
 
 #include <stdint.h>
 
 #include "base/callback.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/native_web_keyboard_event.h"
 #include "content/public/common/drop_data.h"
 #include "ipc/ipc_channel.h"
 #include "ipc/ipc_sender.h"
 #include "third_party/WebKit/public/platform/WebDragOperation.h"
 #include "third_party/WebKit/public/platform/WebGestureEvent.h"
 #include "third_party/WebKit/public/platform/WebInputEvent.h"
 #include "third_party/WebKit/public/web/WebTextDirection.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/surface/transport_dib.h"
 
 namespace blink {
 class WebMouseEvent;
 class WebMouseWheelEvent;
 }
 
+namespace ui {
+class LatencyInfo;
+}
+
 namespace content {
 
 struct CursorInfo;
 class RenderProcessHost;
 class RenderWidgetHostIterator;
 class RenderWidgetHostView;
 struct ScreenInfo;
 
 // A RenderWidgetHost manages the browser side of a browser<->renderer
 // HWND connection.  The HWND lives in the browser process, and
@@ skipping 121 matching lines @@
   virtual void SetActive(bool active) = 0;
 
   // Forwards the given message to the renderer. These are called by
   // the view when it has received a message.
   virtual void ForwardMouseEvent(
       const blink::WebMouseEvent& mouse_event) = 0;
   virtual void ForwardWheelEvent(
       const blink::WebMouseWheelEvent& wheel_event) = 0;
   virtual void ForwardKeyboardEvent(
       const NativeWebKeyboardEvent& key_event) = 0;
+  virtual void ForwardKeyboardEventWithLatencyInfo(
+      const NativeWebKeyboardEvent& key_event,
+      const ui::LatencyInfo& latency_info) = 0;
   virtual void ForwardGestureEvent(
       const blink::WebGestureEvent& gesture_event) = 0;
 
   virtual RenderProcessHost* GetProcess() const = 0;
 
   virtual int GetRoutingID() const = 0;
 
   // Gets the View of this RenderWidgetHost. Can be nullptr, e.g. if the
   // RenderWidget is being destroyed or the render process crashed. You should
   // never cache this pointer since it can become nullptr if the renderer
@@ skipping 86 matching lines @@
   // Filters drop data before it is passed to RenderWidgetHost.
   virtual void FilterDropData(DropData* drop_data) {}
 
   // Sets cursor to a specified one when it is over this widget.
   virtual void SetCursor(const CursorInfo& cursor_info) {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_H_