Fixes incorrect values seen in clip property

third_party/WebKit/Source/core/css/ComputedStyleCSSValueMapping.cpp

 /*
  * Copyright (C) 2004 Zack Rusin <zack@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  * Copyright (C) 2011 Sencha, Inc. All rights reserved.
  * Copyright (C) 2015 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ skipping 2240 matching lines @@
         return valueForBorderRadiusCorner(style.borderBottomLeftRadius(), style);
     case CSSPropertyBorderBottomRightRadius:
         return valueForBorderRadiusCorner(style.borderBottomRightRadius(), style);
     case CSSPropertyBorderTopLeftRadius:
         return valueForBorderRadiusCorner(style.borderTopLeftRadius(), style);
     case CSSPropertyBorderTopRightRadius:
         return valueForBorderRadiusCorner(style.borderTopRightRadius(), style);
     case CSSPropertyClip: {
         if (style.hasAutoClip())
             return cssValuePool().createIdentifierValue(CSSValueAuto);
-        RefPtrWillBeRawPtr<CSSPrimitiveValue> top = zoomAdjustedPixelValue(style.clip().top().value(), style);
-        RefPtrWillBeRawPtr<CSSPrimitiveValue> right = zoomAdjustedPixelValue(style.clip().right().value(), style);
-        RefPtrWillBeRawPtr<CSSPrimitiveValue> bottom = zoomAdjustedPixelValue(style.clip().bottom().value(), style);
-        RefPtrWillBeRawPtr<CSSPrimitiveValue> left = zoomAdjustedPixelValue(style.clip().left().value(), style);
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> top = style.clip().top().isAuto()
+            ? cssValuePool().createIdentifierValue(CSSValueAuto)
+            : zoomAdjustedPixelValue(style.clip().top().value(), style);
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> right = style.clip().right().isAuto()
+            ? cssValuePool().createIdentifierValue(CSSValueAuto)
+            : zoomAdjustedPixelValue(style.clip().right().value(), style);
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> bottom = style.clip().bottom().isAuto()
+            ? cssValuePool().createIdentifierValue(CSSValueAuto)
+            : zoomAdjustedPixelValue(style.clip().bottom().value(), style);
+        RefPtrWillBeRawPtr<CSSPrimitiveValue> left = style.clip().left().isAuto()
+            ? cssValuePool().createIdentifierValue(CSSValueAuto)
+            : zoomAdjustedPixelValue(style.clip().left().value(), style);
         return CSSQuadValue::create(top.release(), right.release(), bottom.release(), left.release(), CSSQuadValue::SerializeAsRect);
     }
     case CSSPropertySpeak:
         return cssValuePool().createValue(style.speak());
     case CSSPropertyTransform:
         return computedTransform(layoutObject, style);
     case CSSPropertyTransformOrigin: {
         RefPtrWillBeRawPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
         if (layoutObject) {
             LayoutRect box;
@@ skipping 415 matching lines @@
     case CSSPropertyAll:
         return nullptr;
     default:
         break;
     }
     ASSERT_NOT_REACHED();
     return nullptr;
 }
 
 }