Allow objects without scrollbars to be scrollable

Source/core/editing/EditorCommand.cpp

Index: Source/core/editing/EditorCommand.cpp
diff --git a/Source/core/editing/EditorCommand.cpp b/Source/core/editing/EditorCommand.cpp
index 17bdd23f39e7635090cb6aa138256fe418814c4f..1661a07ba0dee158ff3f2654b5dfcab074487805 100644
--- a/Source/core/editing/EditorCommand.cpp
+++ b/Source/core/editing/EditorCommand.cpp
@@ -259,7 +259,7 @@ static unsigned verticalScrollDistance(Frame* frame)
     if (!(style->overflowY() == OSCROLL || style->overflowY() == OAUTO || focusedElement->rendererIsEditable()))
         return 0;
     int height = std::min<int>(toRenderBox(renderer)->clientHeight(), frame->view()->visibleHeight());
-    return static_cast<unsigned>(max(max<int>(height * Scrollbar::minFractionToStepWhenPaging(), height - Scrollbar::maxOverlapBetweenPages()), 1));
+    return static_cast<unsigned>(max(max<int>(height * ScrollableArea::minFractionToStepWhenPaging(), height - ScrollableArea::maxOverlapBetweenPages()), 1));
 }
 
 static RefPtr<Range> unionDOMRanges(Range* a, Range* b)