Provided batched input delivery with a BufferedInputRouter

content/browser/renderer_host/input/input_queue_client.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_QUEUE_CLIENT_H_
+#define CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_QUEUE_CLIENT_H_
+
+#include <vector>
+
+#include "base/basictypes.h"
+
+namespace content {
+
+class EventPacket;
+
+class InputQueueClient {
+ public:
+  virtual ~InputQueueClient() {}
+
+  // Used by the flush process for sending batched events to the desired target.
+  virtual void Deliver(const EventPacket& packet) = 0;
+
+  // Signalled when the InputQueue has received and dispatched
+  // event ACK's from the previous flush.
+  virtual void DidFlush() = 0;
+
+  // Signalled when the InputQueue receives an input event.
+  virtual void SetNeedsFlush() = 0;
+
+  // Dispatch an ack'ed event to the client.  Returned events will be inserted
+  // into the current flush stream.
+  virtual std::vector<InputEvent> OnInputEventAck(
+      const InputEvent& acked_event) = 0;
+};
+
+} // namespace content
+
+#endif // CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_QUEUE_CLIENT_H_