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 5fcf7e24a6324c364a275aad56fa3eb3ee843699..602979edc2ef7d1d0fbd81d4b39177e2c3198f72 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 || focusedNode->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)