Remove WebAnimationsElementAnimate 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 3153 matching lines @@
         return false;
     args->next();
     return true;
 }
 
 PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseAnimationTimingFunction()
 {
     CSSParserValue* value = m_valueList->current();
     if (value->id == CSSValueEase || value->id == CSSValueLinear || value->id == CSSValueEaseIn || value->id == CSSValueEaseOut
         || value->id == CSSValueEaseInOut || value->id == CSSValueStepStart || value->id == CSSValueStepEnd
-        || (value->id == CSSValueStepMiddle && RuntimeEnabledFeatures::webAnimationsElementAnimateEnabled()))
+        || value->id == CSSValueStepMiddle)
         return cssValuePool().createIdentifierValue(value->id);
 
     // We must be a function.
     if (value->unit != CSSParserValue::Function)
         return nullptr;
 
     CSSParserValueList* args = value->function->args.get();
 
     if (equalIgnoringCase(value->function->name, "steps(")) {
         // For steps, 1 or 2 params must be specified (comma-separated)
@@ skipping 5243 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