Indicate whether a touch event will cause scrolling

content/browser/renderer_host/input/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_TOUCH_EVENT_QUEUE_H_
 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_TOUCH_EVENT_QUEUE_H_
 
 #include <deque>
 #include <map>
 
@@ skipping 41 matching lines @@
     // Send touchmove events throughout a scroll, but throttle sending and
     // ignore the ACK as long as scrolling remains possible.  Unconsumed scroll
     // events return touchmove events to being dispatched synchronously.
     TOUCH_SCROLLING_MODE_ASYNC_TOUCHMOVE,
     TOUCH_SCROLLING_MODE_DEFAULT = TOUCH_SCROLLING_MODE_ASYNC_TOUCHMOVE
   };
 
   struct CONTENT_EXPORT Config {
     Config();
 
-    // Determines the bounds of the (square) touchmove slop suppression region.
-    // Defaults to 0 (disabled).
-    double touchmove_slop_suppression_length_dips;
-
     // Determines the type of touch scrolling.
     // Defaults to TouchEventQueue:::TOUCH_SCROLLING_MODE_DEFAULT.
     TouchEventQueue::TouchScrollingMode touch_scrolling_mode;
 
     // Controls whether touch ack timeouts will trigger touch cancellation.
     // Defaults to 200ms.
     base::TimeDelta touch_ack_timeout_delay;
 
     // Whether the platform supports touch ack timeout behavior.
     // Defaults to false (disabled).
@@ skipping 164 matching lines @@
   // setting for experimentation, but we may evolve it into an app-controlled
   // mode.
   const TouchScrollingMode touch_scrolling_mode_;
 
   DISALLOW_COPY_AND_ASSIGN(TouchEventQueue);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_INPUT_TOUCH_EVENT_QUEUE_H_