Remove CSSWillChange runtime flag (status=stable)

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 1322 matching lines @@
         else
             validPrimitive = validUnit(value, FLength | FNonNeg);
         break;
     case CSSPropertyWebkitColumnSpan: // none | all | 1 (will be dropped in the unprefixed property)
         validPrimitive = id == CSSValueAll || id == CSSValueNone || (value->unit == CSSPrimitiveValue::CSS_NUMBER && value->fValue == 1);
         break;
     case CSSPropertyWebkitColumnWidth:         // auto | <length>
         parsedValue = parseColumnWidth();
         break;
     case CSSPropertyWillChange:
-        if (!RuntimeEnabledFeatures::cssWillChangeEnabled())
-            return false;
         return parseWillChange(important);
     // End of CSS3 properties
 
     // Apple specific properties.  These will never be standardized and are purely to
     // support custom WebKit-based Apple applications.
     case CSSPropertyWebkitLineClamp:
         // When specifying number of lines, don't allow 0 as a valid value
         // When specifying either type of unit, require non-negative integers
         validPrimitive = (!id && (value->unit == CSSPrimitiveValue::CSS_PERCENTAGE || value->fValue) && validUnit(value, FInteger | FPercent | FNonNeg, HTMLQuirksMode));
         break;
@@ skipping 5919 matching lines @@
 
         // Skip the comma and move on to the next argument.
         arg = functionArgs->next();
     }
 
     return imageSet.release();
 }
 
 bool CSSPropertyParser::parseWillChange(bool important)
 {
-    ASSERT(RuntimeEnabledFeatures::cssWillChangeEnabled());
-
     RefPtrWillBeRawPtr<CSSValueList> values = CSSValueList::createCommaSeparated();
     if (m_valueList->current()->id == CSSValueAuto) {
         if (m_valueList->next())
             return false;
     }
 
     // Every comma-separated list of CSS_IDENTs is a valid will-change value,
     // unless the list includes an explicitly disallowed CSS_IDENT.
     bool expectComma = false;
     for (CSSParserValue* currentValue = m_valueList->current(); currentValue; currentValue = m_valueList->next()) {
@@ skipping 1183 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 blink