Early terminate flings when scrolling impossible

content/child/touch_fling_gesture_curve.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 "content/child/touch_fling_gesture_curve.h"
 
 #include <cmath>
 
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
@@ skipping 132 matching lines @@
   WebFloatSize scroll(displacement * displacement_ratio_.x,
                       displacement * displacement_ratio_.y);
   WebFloatSize scroll_increment(scroll.width - cumulative_scroll_.width,
                                 scroll.height - cumulative_scroll_.height);
   WebFloatSize scroll_velocity(speed * displacement_ratio_.x,
                                speed * displacement_ratio_.y);
   cumulative_scroll_ = scroll;
 
   if (time + time_offset_ < curve_duration_ ||
       scroll_increment != WebFloatSize()) {
-    target->notifyCurrentFlingVelocity(scroll_velocity);
     // scrollBy() could delete this curve if the animation is over, so don't
     // touch any member variables after making that call.
-    target->scrollBy(scroll_increment);
-    return true;
+    return target->scrollBy(scroll_increment, scroll_velocity);
   }
 
   return false;
 }
 
 } // namespace content