Remove the BufferedInputRouter

content/browser/renderer_host/input/input_queue.h

-// Copyright 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_H_
-#define CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_QUEUE_H_
-
-#include "base/basictypes.h"
-#include "base/memory/scoped_ptr.h"
-#include "content/common/content_export.h"
-#include "content/common/input/input_event_disposition.h"
-
-namespace content {
-
-class BrowserInputEvent;
-class EventPacketAck;
-class InputQueueClient;
-
-// |InputQueue| handles browser input event batching and response.
-// Event packets are assembled into sequential event packets. A flush entails
-// delivery and dispatch of a single event packet, and continues until the
-// packet is ack'ed and all its events have been dispatched to the renderer.
-class CONTENT_EXPORT InputQueue {
- public:
-  // The |client| should outlive the InputQueue.
-  InputQueue(InputQueueClient* client);
-  virtual ~InputQueue();
-
-  // If a flush is in progress, |event| will be dispatched in the next flush.
-  // If no flush is in progress, a flush will be requested if necessary.
-  // |event| is assumed to be both non-NULL and valid.
-  void QueueEvent(scoped_ptr<BrowserInputEvent> event);
-
-  // Initiates the flush of the pending event packet to |client_|, if necessary.
-  // This should only be called in response to |client_->SetNeedsFlush()|.
-  void BeginFlush();
-
-  // Called by the owner upon EventPacket responses from the sender target. This
-  // will dispatch event acks for events with a corresponding |ack_handler|.
-  enum AckResult {
-    ACK_OK,          // |acked_packet| was processed successfully.
-    ACK_UNEXPECTED,  // |acked_packet| was unexpected; no flush was in-progress.
-    ACK_INVALID,     // |acked_packet| contains invalid data.
-    ACK_SHUTDOWN     // |acked_packet| processing triggered queue shutdown.
-  };
-  AckResult OnEventPacketAck(int64 packet_id,
-                             const InputEventDispositions& dispositions);
-
-  // Total number of evenst in the queue, both being flushed and pending flush.
-  size_t QueuedEventCount() const;
-
- protected:
-  friend class InputQueueTest;
-
-  // Delivers |in_flush_packet_| to the client.
-  void DeliverInFlushPacket();
-
-  // Requests a flush via |client_| if the necessary request has not been made.
-  void RequestFlushIfNecessary();
-
-  // True when |in_flush_packet_| is non-empty.
-  bool FlushInProgress() const;
-
- private:
-  InputQueueClient* client_;
-
-  // Used to assign unique, non-zero ID's to each delivered EventPacket.
-  int64 next_packet_id_;
-
-  // Avoid spamming the client with redundant flush requests.
-  bool flush_requested_;
-
-  class BrowserEventPacket;
-  scoped_ptr<BrowserEventPacket> in_flush_packet_;
-  scoped_ptr<BrowserEventPacket> pending_flush_packet_;
-
-  DISALLOW_COPY_AND_ASSIGN(InputQueue);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_QUEUE_H_