Move touch slop suppression to TouchEventManager

content/browser/renderer_host/input/legacy_touch_event_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_LEGACY_TOUCH_EVENT_QUEUE_H_
 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_LEGACY_TOUCH_EVENT_QUEUE_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 78 matching lines @@
   size_t size() const { return touch_queue_.size(); }
 
   bool has_handlers() const { return has_handlers_; }
 
   size_t uncancelable_touch_moves_pending_ack_count() const {
     return ack_pending_async_touchmove_ids_.size();
   }
 
  private:
   class TouchTimeoutHandler;
-  class TouchMoveSlopSuppressor;
   friend class TouchTimeoutHandler;
   friend class TouchEventQueueTest;
 
   bool HasPendingAsyncTouchMoveForTesting() const;
   bool IsTimeoutRunningForTesting() const;
   const TouchEventWithLatencyInfo& GetLatestEventForTesting() const;
 
   // Empties the queue of touch events. This may result in any number of gesture
   // events being sent to the renderer.
   void FlushQueue();
@@ skipping 64 matching lines @@
   // Whether to allow any remaining touches for the current sequence. Note that
   // this is a stricter condition than an empty |touch_consumer_states_|, as it
   // also prevents forwarding of touchstart events for new pointers in the
   // current sequence. This is only used when the event is synthetically
   // cancelled after a touch timeout.
   bool drop_remaining_touches_in_sequence_;
 
   // Optional handler for timed-out touch event acks.
   std::unique_ptr<TouchTimeoutHandler> timeout_handler_;
 
-  // Suppression of TouchMove's within a slop region when a sequence has not yet
-  // been preventDefaulted.
-  std::unique_ptr<TouchMoveSlopSuppressor> touchmove_slop_suppressor_;
-
   // Whether touch events should remain buffered and dispatched asynchronously
   // while a scroll sequence is active.  In this mode, touchmove's are throttled
   // and ack'ed immediately, but remain buffered in |pending_async_touchmove_|
   // until a sufficient time period has elapsed since the last sent touch event.
   // For details see the design doc at http://goo.gl/lVyJAa.
   bool send_touch_events_async_;
   std::unique_ptr<TouchEventWithLatencyInfo> pending_async_touchmove_;
 
   // For uncancelable touch moves, not only we send a fake ack, but also a real
   // ack from render, which we use to decide when to send the next async
   // touchmove. This can help avoid the touch event queue keep growing when
   // render handles touchmove slow. We use a queue
   // ack_pending_async_touchmove_ids to store the recent dispatched
   // uncancelable touchmoves which are still waiting for their acks back from
   // render. We do not put them back to the front the touch_event_queue any
   // more.
   std::deque<uint32_t> ack_pending_async_touchmove_ids_;
 
   double last_sent_touch_timestamp_sec_;
 
   // Event is saved to compare pointer positions for new touchmove events.
   std::unique_ptr<blink::WebTouchEvent> last_sent_touchevent_;
 
   DISALLOW_COPY_AND_ASSIGN(LegacyTouchEventQueue);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_INPUT_LEGACY_TOUCH_EVENT_QUEUE_H_