Add support for the object-position CSS property.

Source/core/css/resolver/StyleBuilderCustom.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
@@ skipping 852 matching lines @@
 }
 
 Length StyleBuilderConverter::convertLengthMaxSizing(StyleResolverState& state, CSSValue* value)
 {
     CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);
     if (primitiveValue->getValueID() == CSSValueNone)
         return Length(Undefined);
     return convertLengthSizing(state, value);
 }
 
+LengthPoint StyleBuilderConverter::convertLengthPoint(StyleResolverState& state, CSSValue* value)
+{
+    CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);
+    Pair* pair = primitiveValue->getPairValue();
+    Length x = pair->first()->convertToLength<FixedIntegerConversion | PercentConversion>(state.style(), state.rootElementStyle(), state.style()->effectiveZoom());
+    Length y = pair->second()->convertToLength<FixedIntegerConversion | PercentConversion>(state.style(), state.rootElementStyle(), state.style()->effectiveZoom());
+    return LengthPoint(x, y);
+}
+
 LengthSize StyleBuilderConverter::convertRadius(StyleResolverState& state, CSSValue* value)
 {
     CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);
     Pair* pair = primitiveValue->getPairValue();
     Length radiusWidth = pair->first()->convertToLength<FixedIntegerConversion | PercentConversion>(state.style(), state.rootElementStyle(), state.style()->effectiveZoom());
     Length radiusHeight = pair->second()->convertToLength<FixedIntegerConversion | PercentConversion>(state.style(), state.rootElementStyle(), state.style()->effectiveZoom());
     float width = radiusWidth.value();
     float height = radiusHeight.value();
     ASSERT(width >= 0 && height >= 0);
     if (width <= 0 || height <= 0)
@@ skipping 554 matching lines @@
     case CSSPropertyBorderImage:
     case CSSPropertyBorderLeft:
     case CSSPropertyBorderRadius:
     case CSSPropertyBorderRight:
     case CSSPropertyBorderSpacing:
     case CSSPropertyBorderStyle:
     case CSSPropertyBorderTop:
     case CSSPropertyBorderWidth:
     case CSSPropertyListStyle:
     case CSSPropertyMargin:
+    case CSSPropertyObjectPosition:
     case CSSPropertyOutline:
     case CSSPropertyOverflow:
     case CSSPropertyPadding:
     case CSSPropertyTransition:
     case CSSPropertyWebkitAnimation:
     case CSSPropertyWebkitBorderAfter:
     case CSSPropertyWebkitBorderBefore:
     case CSSPropertyWebkitBorderEnd:
     case CSSPropertyWebkitBorderStart:
     case CSSPropertyWebkitBorderRadius:
@@ skipping 929 matching lines @@
         break;
     }
     case CSSPropertyEnableBackground:
         // Silently ignoring this property for now
         // http://bugs.webkit.org/show_bug.cgi?id=6022
         break;
     }
 }
 
 } // namespace WebCore