Introduce composed tree version of inSameLine()

Source/core/editing/VisibleUnits.h

 /*
  * Copyright (C) 2004 Apple Computer, Inc.  All rights reserved.
  *
  * 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.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 102 matching lines @@
 CORE_EXPORT VisiblePosition endOfSentence(const VisiblePosition&);
 VisiblePosition previousSentencePosition(const VisiblePosition&);
 VisiblePosition nextSentencePosition(const VisiblePosition&);
 
 // lines
 VisiblePosition startOfLine(const VisiblePosition&);
 VisiblePosition endOfLine(const VisiblePosition&);
 CORE_EXPORT VisiblePosition previousLinePosition(const VisiblePosition&, LayoutUnit lineDirectionPoint, EditableType = ContentIsEditable);
 CORE_EXPORT VisiblePosition nextLinePosition(const VisiblePosition&, LayoutUnit lineDirectionPoint, EditableType = ContentIsEditable);
 CORE_EXPORT bool inSameLine(const VisiblePosition&, const VisiblePosition&);
+CORE_EXPORT bool inSameLine(const VisiblePositionInComposedTree&, const VisiblePositionInComposedTree&);
 CORE_EXPORT bool inSameLine(const PositionWithAffinity&, const PositionWithAffinity&);
 CORE_EXPORT bool inSameLine(const PositionInComposedTreeWithAffinity&, const PositionInComposedTreeWithAffinity&);
 bool isStartOfLine(const VisiblePosition&);
 bool isEndOfLine(const VisiblePosition&);
 VisiblePosition logicalStartOfLine(const VisiblePosition&);
 VisiblePosition logicalEndOfLine(const VisiblePosition&);
 bool isLogicalEndOfLine(const VisiblePosition&);
 VisiblePosition leftBoundaryOfLine(const VisiblePosition&, TextDirection);
 VisiblePosition rightBoundaryOfLine(const VisiblePosition&, TextDirection);
 
@@ skipping 40 matching lines @@
 
 // Returns a hit-tested VisiblePosition for the given point in contents-space
 // coordinates.
 CORE_EXPORT VisiblePosition visiblePositionForContentsPoint(const IntPoint&, LocalFrame*);
 
 CORE_EXPORT bool rendersInDifferentPosition(const Position&, const Position&);
 
 } // namespace blink
 
 #endif // VisibleUnits_h