Add latency info to input events sent to RenderWidget.

content/browser/renderer_host/event_with_latency_info.h

+// Copyright (c) 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 CONTENT_BROWSER_RENDERER_HOST_EVENT_WITH_LATENCY_INFO_H_
+#define CONTENT_BROWSER_RENDERER_HOST_EVENT_WITH_LATENCY_INFO_H_
+
+#include <cc/debug/latency_info.h>
+
+namespace WebKit {
+class WebGestureEvent;
+class WebMouseEvent;
+class WebMouseWheelEvent;
+}
+
+namespace content {
+
+template <typename T>
+class EventWithLatencyInfo {
+ public:
+  T event;
+  cc::LatencyInfo latency;
+
+  EventWithLatencyInfo(const T& e, const cc::LatencyInfo& l)
+      : event(e), latency(l) {}
+
+  EventWithLatencyInfo() {}
+};
+
+typedef EventWithLatencyInfo<WebKit::WebGestureEvent>
+    GestureEventWithLatencyInfo;
+typedef EventWithLatencyInfo<WebKit::WebMouseWheelEvent>
+    MouseWheelEventWithLatencyInfo;
+typedef EventWithLatencyInfo<WebKit::WebMouseEvent>
+    MouseEventWithLatencyInfo;
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_RENDERER_HOST_EVENT_WITH_LATENCY_INFO_H_