OverscrollGlow for mainThread-{BLINK CHANGES}

Source/platform/scroll/ScrollableArea.cpp

Index: Source/platform/scroll/ScrollableArea.cpp
diff --git a/Source/platform/scroll/ScrollableArea.cpp b/Source/platform/scroll/ScrollableArea.cpp
index b77c1f997d93ceaa6d0d9fa297de0c758a7c1c48..3525b714c95eb7974b62f4aad1eec37b53994f6c 100644
--- a/Source/platform/scroll/ScrollableArea.cpp
+++ b/Source/platform/scroll/ScrollableArea.cpp
@@ -120,7 +120,7 @@ GraphicsLayer* ScrollableArea::layerForContainer() const
     return layerForScrolling() ? layerForScrolling()->parent() : 0;
 }
 
-bool ScrollableArea::scroll(ScrollDirection direction, ScrollGranularity granularity, float delta)
+ScrollResultOneDimensional ScrollableArea::scroll(ScrollDirection direction, ScrollGranularity granularity, float delta)
 {
     ScrollbarOrientation orientation;
 
@@ -130,7 +130,7 @@ bool ScrollableArea::scroll(ScrollDirection direction, ScrollGranularity granula
         orientation = HorizontalScrollbar;
 
     if (!userInputScrollable(orientation))
-        return false;
+        return ScrollResultOneDimensional(false, delta);
 
     cancelProgrammaticScrollAnimation();
 
@@ -154,7 +154,7 @@ bool ScrollableArea::scroll(ScrollDirection direction, ScrollGranularity granula
     if (direction == ScrollUp || direction == ScrollLeft)
         delta = -delta;
 
-    return scrollAnimator()->scroll(orientation, granularity, step, delta).didScroll;
+    return scrollAnimator()->scroll(orientation, granularity, step, delta);
 }
 
 void ScrollableArea::setScrollPosition(const DoublePoint& position, ScrollBehavior behavior)