Introduce LayoutObject::createPositionWithAffinity(int offset)

Source/core/layout/LayoutReplaced.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011-2012. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 402 matching lines @@
     InlineBox* box = inlineBoxWrapper();
     RootInlineBox* rootBox = box ? &box->root() : 0;
 
     LayoutUnit top = rootBox ? rootBox->selectionTop() : logicalTop();
     LayoutUnit bottom = rootBox ? rootBox->selectionBottom() : logicalBottom();
 
     LayoutUnit blockDirectionPosition = isHorizontalWritingMode() ? point.y() + location().y() : point.x() + location().x();
     LayoutUnit lineDirectionPosition = isHorizontalWritingMode() ? point.x() + location().x() : point.y() + location().y();
 
     if (blockDirectionPosition < top)
-        return createPositionWithAffinity(caretMinOffset(), DOWNSTREAM); // coordinates are above
+        return createPositionWithAffinity(caretMinOffset()); // coordinates are above
 
     if (blockDirectionPosition >= bottom)
-        return createPositionWithAffinity(caretMaxOffset(), DOWNSTREAM); // coordinates are below
+        return createPositionWithAffinity(caretMaxOffset()); // coordinates are below
 
     if (node()) {
         if (lineDirectionPosition <= logicalLeft() + (logicalWidth() / 2))
-            return createPositionWithAffinity(0, DOWNSTREAM);
-        return createPositionWithAffinity(1, DOWNSTREAM);
+            return createPositionWithAffinity(0);
+        return createPositionWithAffinity(1);
     }
 
     return LayoutBox::positionForPoint(point);
 }
 
 LayoutRect LayoutReplaced::selectionRectForPaintInvalidation(const LayoutBoxModelObject* paintInvalidationContainer) const
 {
     ASSERT(!needsLayout());
 
     if (!isSelected())
@@ skipping 69 matching lines @@
         return LayoutRect();
 
     // The selectionRect can project outside of the overflowRect, so take their union
     // for paint invalidation to avoid selection painting glitches.
     LayoutRect r = isSelected() ? localSelectionRect() : visualOverflowRect();
     mapRectToPaintInvalidationBacking(paintInvalidationContainer, r, paintInvalidationState);
     return r;
 }
 
 }