Remove GestureEventFilter and clean up related bits assuming that we turn on

content/browser/renderer_host/input/tap_suppression_controller.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_TAP_SUPPRESSION_CONTROLLER_H_
-#define CONTENT_BROWSER_RENDERER_HOST_INPUT_TAP_SUPPRESSION_CONTROLLER_H_
-
-#include "base/time/time.h"
-#include "base/timer/timer.h"
-#include "content/common/content_export.h"
-
-namespace content {
-
-class TapSuppressionControllerClient;
-
-// The core controller for suppression of taps (touchpad or touchscreen)
-// immediately following a GestureFlingCancel event (caused by the same tap).
-// Only taps of sufficient speed and within a specified time window after a
-// GestureFlingCancel are suppressed.
-class CONTENT_EXPORT TapSuppressionController {
- public:
-  explicit TapSuppressionController(TapSuppressionControllerClient* client);
-  virtual ~TapSuppressionController();
-
-  // Should be called whenever a GestureFlingCancel event is received.
-  void GestureFlingCancel();
-
-  // Should be called whenever an ACK for a GestureFlingCancel event is
-  // received. |processed| is true when the GestureFlingCancel actually stopped
-  // a fling and therefore should suppress the forwarding of the following tap.
-  void GestureFlingCancelAck(bool processed);
-
-  // Should be called whenever a tap down (touchpad or touchscreen) is received.
-  // Returns true if the tap down should be deferred. The caller is responsible
-  // for keeping the event for later release, if needed.
-  bool ShouldDeferTapDown();
-
-  // Should be called whenever a tap up (touchpad or touchscreen) is received.
-  // Returns true if the tap up should be suppressed.
-  bool ShouldSuppressTapUp();
-
-  // Should be called whenever a tap cancel is received. Returns true if the tap
-  // cancel should be suppressed.
-  bool ShouldSuppressTapCancel();
-
- protected:
-  virtual base::TimeTicks Now();
-  virtual void StartTapDownTimer(const base::TimeDelta& delay);
-  virtual void StopTapDownTimer();
-  void TapDownTimerExpired();
-
- private:
-  friend class MockTapSuppressionController;
-
-  enum State {
-    NOTHING,
-    GFC_IN_PROGRESS,
-    TAP_DOWN_STASHED,
-    LAST_CANCEL_STOPPED_FLING,
-  };
-
-
-  TapSuppressionControllerClient* client_;
-  base::OneShotTimer<TapSuppressionController> tap_down_timer_;
-  State state_;
-
-  // TODO(rjkroege): During debugging, the event times did not prove reliable.
-  // Replace the use of base::TimeTicks with an accurate event time when they
-  // become available post http://crbug.com/119556.
-  base::TimeTicks fling_cancel_time_;
-
-  DISALLOW_COPY_AND_ASSIGN(TapSuppressionController);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_RENDERER_HOST_INPUT_TAP_SUPPRESSION_CONTROLLER_H_