OverscrollGlow for mainThread-{BLINK CHANGES}

Source/core/frame/RootFrameViewport.cpp

Index: Source/core/frame/RootFrameViewport.cpp
diff --git a/Source/core/frame/RootFrameViewport.cpp b/Source/core/frame/RootFrameViewport.cpp
index 155630db1f7c824e697c5bc41e6bbdf3ba7c1512..343e2c3f57da3b59a96c8960e24e6e8c1cd4441c 100644
--- a/Source/core/frame/RootFrameViewport.cpp
+++ b/Source/core/frame/RootFrameViewport.cpp
@@ -276,7 +276,7 @@ GraphicsLayer* RootFrameViewport::layerForVerticalScrollbar() const
     return layoutViewport().layerForVerticalScrollbar();
 }
 
-bool RootFrameViewport::scroll(ScrollDirection direction, ScrollGranularity granularity, float delta)
+ScrollResultOneDimensional RootFrameViewport::scroll(ScrollDirection direction, ScrollGranularity granularity, float delta)
 {
     updateScrollAnimator();
 
@@ -296,7 +296,7 @@ bool RootFrameViewport::scroll(ScrollDirection direction, ScrollGranularity gran
     if (layoutViewport().userInputScrollable(orientation))
         return layoutViewport().scroll(direction, granularity, delta);
 
-    return false;
+    return ScrollResultOneDimensional(false);
 }
 
 } // namespace blink