Rename ScrollableArea::scroll to userScroll

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 18c437000170df4c889b01fea2fb051793684606..e5107b10de9c20e41b2f0d635cddb9cb6e076888 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(ScrollDirectionPhysical direction, ScrollGranularity granularity, float delta)
+bool RootFrameViewport::userScroll(ScrollDirectionPhysical direction, ScrollGranularity granularity, float delta)
 {
     updateScrollAnimator();
 
@@ -288,13 +288,13 @@ bool RootFrameViewport::scroll(ScrollDirectionPhysical direction, ScrollGranular
         orientation = HorizontalScrollbar;
 
     if (layoutViewport().userInputScrollable(orientation) && visualViewport().userInputScrollable(orientation))
-        return ScrollableArea::scroll(direction, granularity, delta);
+        return ScrollableArea::userScroll(direction, granularity, delta);
 
     if (visualViewport().userInputScrollable(orientation))
-        return visualViewport().scroll(direction, granularity, delta);
+        return visualViewport().userScroll(direction, granularity, delta);
 
     if (layoutViewport().userInputScrollable(orientation))
-        return layoutViewport().scroll(direction, granularity, delta);
+        return layoutViewport().userScroll(direction, granularity, delta);
 
     return false;
 }