Provided batched input delivery with a BufferedInputRouter

content/browser/renderer_host/input/input_ack_observer.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_INPUT_INPUT_ACK_OBSERVER_H_
+#define CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_ACK_OBSERVER_H_
+
+#include "base/basictypes.h"
+
+namespace content {
+
+class InputEvent;
+
+// Queued with an InputEvent to allow customized ack response.
+class InputAckObserver {
+ public:
+  virtual ~InputAckObserver() { }
+
+  virtual void OnInputEventAck(const InputEvent& acked_event) = 0;
+};
+
+} // namespace content
+
+#endif // CONTENT_BROWSER_RENDERER_HOST_INPUT_EVENT_ACK_OBSERVER_H_