Allow objects without scrollbars to be scrollable

Source/core/editing/EditorCommand.cpp

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2009 Igalia S.L.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 241 matching lines @@
         return 0;
     RenderObject* renderer = focusedNode->renderer();
     if (!renderer || !renderer->isBox())
         return 0;
     RenderStyle* style = renderer->style();
     if (!style)
         return 0;
     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)
 {
     Range* start = a->compareBoundaryPoints(Range::START_TO_START, b, ASSERT_NO_EXCEPTION) <= 0 ? a : b;
     Range* end = a->compareBoundaryPoints(Range::END_TO_END, b, ASSERT_NO_EXCEPTION) <= 0 ? b : a;
 
     return Range::create(a->ownerDocument(), start->startContainer(), start->startOffset(), end->endContainer(), end->endOffset());
 }
 
@@ skipping 1454 matching lines @@
         return m_command->state(m_frame.get(), triggeringEvent) == TrueTriState ? "true" : "false";
     return m_command->value(m_frame.get(), triggeringEvent);
 }
 
 bool Editor::Command::isTextInsertion() const
 {
     return m_command && m_command->isTextInsertion;
 }
 
 } // namespace WebCore