[CSS Grid Layout] Introduce an explicit type for resolved grid positions

Source/core/css/parser/CSSPropertyParser.cpp

 /*
  * Copyright (C) 2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
  * Copyright (C) 2012 Intel Corporation. All rights reserved.
  *
@@ skipping 3845 matching lines @@
         }
 
         NamedGridAreaMap::iterator gridAreaIt = gridAreaMap.find(gridAreaName);
         if (gridAreaIt == gridAreaMap.end()) {
             gridAreaMap.add(gridAreaName, GridCoordinate(GridSpan(rowCount, rowCount), GridSpan(currentCol, lookAheadCol)));
         } else {
             GridCoordinate& gridCoordinate = gridAreaIt->value;
 
             // The following checks test that the grid area is a single filled-in rectangle.
             // 1. The new row is adjacent to the previously parsed row.
-            if (rowCount != gridCoordinate.rows.finalPositionIndex + 1)
+            if (rowCount != gridCoordinate.rows.resolvedFinalPosition.toInt() + 1)
                 return false;
 
             // 2. The new area starts at the same position as the previously parsed area.
-            if (currentCol != gridCoordinate.columns.initialPositionIndex)
+            if (currentCol != gridCoordinate.columns.resolvedInitialPosition.toInt())
                 return false;
 
             // 3. The new area ends at the same position as the previously parsed area.
-            if (lookAheadCol != gridCoordinate.columns.finalPositionIndex)
+            if (lookAheadCol != gridCoordinate.columns.resolvedFinalPosition.toInt())
                 return false;
 
-            ++gridCoordinate.rows.finalPositionIndex;
+            ++gridCoordinate.rows.resolvedFinalPosition;
         }
         currentCol = lookAheadCol;
     }
 
     m_valueList->next();
     return true;
 }
 
 PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseGridTemplateAreas()
 {
@@ skipping 4567 matching lines @@
         parsedValues->append(CSSPrimitiveValue::createIdentifier(CSSValueFill));
     if (!seenStroke)
         parsedValues->append(CSSPrimitiveValue::createIdentifier(CSSValueStroke));
     if (!seenMarkers)
         parsedValues->append(CSSPrimitiveValue::createIdentifier(CSSValueMarkers));
 
     return parsedValues.release();
 }
 
 } // namespace WebCore