Redefined the bit WebTouchEvent.causesScrollingIfUncanceled.

ui/events/gestures/gesture_provider_aura.cc

 // Copyright 2014 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.
 
 #include "ui/events/gestures/gesture_provider_aura.h"
 
 #include <utility>
 
 #include "base/auto_reset.h"
 #include "base/logging.h"
@@ skipping 18 matching lines @@
 GestureProviderAura::~GestureProviderAura() {}
 
 bool GestureProviderAura::OnTouchEvent(TouchEvent* event) {
   if (!pointer_state_.OnTouch(*event))
     return false;
 
   auto result = filtered_gesture_provider_.OnTouchEvent(pointer_state_);
   if (!result.succeeded)
     return false;
 
-  event->set_may_cause_scrolling(result.did_generate_scroll);
+  event->set_may_cause_scrolling(result.moved_beyond_slop_region);
   pointer_state_.CleanupRemovedTouchPoints(*event);
   return true;
 }
 
 void GestureProviderAura::OnTouchEventAck(uint32_t unique_event_id,
                                           bool event_consumed) {
   DCHECK(pending_gestures_.empty());
   DCHECK(!handling_event_);
   base::AutoReset<bool> handling_event(&handling_event_, true);
   filtered_gesture_provider_.OnTouchEventAck(unique_event_id, event_consumed);
@@ skipping 18 matching lines @@
   if (pending_gestures_.empty())
     return NULL;
   // Caller is responsible for deleting old_pending_gestures.
   ScopedVector<GestureEvent>* old_pending_gestures =
       new ScopedVector<GestureEvent>();
   old_pending_gestures->swap(pending_gestures_);
   return old_pending_gestures;
 }
 
 }  // namespace content