OverscrollGlow for mainThread-{BLINK CHANGES}

Source/core/frame/FrameView.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Dirk Mueller <mueller@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
@@ skipping 3230 matching lines @@
 void FrameView::setScrollOffset(const IntPoint& offset)
 {
     scrollTo(DoublePoint(adjustScrollPositionWithinRange(offset)));
 }
 
 void FrameView::setScrollOffset(const DoublePoint& offset)
 {
     scrollTo(adjustScrollPositionWithinRange(offset));
 }
 
-bool FrameView::scroll(ScrollDirection direction, ScrollGranularity granularity, float delta)
+ScrollResultOneDimensional FrameView::scroll(ScrollDirection direction, ScrollGranularity granularity, float delta)
 {
     ScrollDirection physicalDirection =
         toPhysicalDirection(direction, isVerticalDocument(), isFlippedDocument());
 
     return ScrollableArea::scroll(physicalDirection, granularity, delta);
 }
 
 void FrameView::windowResizerRectChanged()
 {
     updateScrollbars(scrollOffsetDouble());
@@ skipping 749 matching lines @@
 LayoutObject* FrameView::viewportLayoutObject()
 {
     if (Document* document = frame().document()) {
         if (Element* element = document->viewportDefiningElement())
             return element->layoutObject();
     }
     return nullptr;
 }
 
 } // namespace blink