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 3253 matching lines @@
 void FrameView::setScrollOffset(const DoublePoint& offset)
 {
     scrollTo(adjustScrollPositionWithinRange(offset));
 }
 
 bool FrameView::scroll(ScrollDirection direction, ScrollGranularity granularity)
 {
     ScrollDirection physicalDirection =
         toPhysicalDirection(direction, isVerticalDocument(), isFlippedDocument());
 
-    return ScrollableArea::scroll(physicalDirection, granularity);
+    return ScrollableArea::scroll(physicalDirection, granularity).didScroll;
 }
 
 void FrameView::windowResizerRectChanged()
 {
     updateScrollbars(scrollOffsetDouble());
 }
 
 bool FrameView::hasOverlayScrollbars() const
 {
 
@@ skipping 701 matching lines @@
 {
     Settings* settings = frame().settings();
     if (!settings || !settings->rootLayerScrolls())
         return this;
 
     LayoutView* layoutView = this->layoutView();
     return layoutView ? layoutView->scrollableArea() : nullptr;
 }
 
 } // namespace blink