Remove superfluous CSSLinearTimingFunctionValue

Source/core/css/CSSToStyleMap.cpp

 /*
  * 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 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.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
@@ skipping 481 matching lines @@
         }
         return;
     }
 
     if (value->isCubicBezierTimingFunctionValue()) {
         CSSCubicBezierTimingFunctionValue* cubicTimingFunction = static_cast<CSSCubicBezierTimingFunctionValue*>(value);
         animation->setTimingFunction(CubicBezierTimingFunction::create(cubicTimingFunction->x1(), cubicTimingFunction->y1(), cubicTimingFunction->x2(), cubicTimingFunction->y2()));
     } else if (value->isStepsTimingFunctionValue()) {
         CSSStepsTimingFunctionValue* stepsTimingFunction = static_cast<CSSStepsTimingFunctionValue*>(value);
         animation->setTimingFunction(StepsTimingFunction::create(stepsTimingFunction->numberOfSteps(), stepsTimingFunction->stepAtStart()));
-    } else if (value->isLinearTimingFunctionValue())
-        animation->setTimingFunction(LinearTimingFunction::create());
+    }
 }
 
 void CSSToStyleMap::mapNinePieceImage(RenderStyle* mutableStyle, CSSPropertyID property, CSSValue* value, NinePieceImage& image)
 {
     // If we're not a value list, then we are "none" and don't need to alter the empty image at all.
     if (!value || !value->isValueList())
         return;
 
     // Retrieve the border image value.
     CSSValueList* borderImage = toCSSValueList(value);
@@ skipping 168 matching lines @@
         verticalRule = SpaceImageRule;
         break;
     default: // CSSValueRepeat
         verticalRule = RepeatImageRule;
         break;
     }
     image.setVerticalRule(verticalRule);
 }
 
 };