Implement computed style for animation shorthand and align parsing with the spec.

Source/core/css/CSSParser-in.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 3071 matching lines @@
             lval = list;
         }
     }
     else
         lval = rval;
 }
 
 bool CSSParser::parseAnimationShorthand(CSSPropertyID propId, bool important)
 {
     const StylePropertyShorthand& animationProperties = parsingShorthandForProperty(propId);
-    const unsigned numProperties = 7;
+    const unsigned numProperties = 8;
 
     // The list of properties in the shorthand should be the same
     // length as the list with animation name in last position, even though they are
     // in a different order.
     ASSERT(numProperties == animationProperties.length());
     ASSERT(numProperties == shorthandForProperty(propId).length());
 
     ShorthandScope scope(this, propId);
 
     bool parsedProperty[numProperties] = { false };
@@ skipping 19 matching lines @@
         bool found = false;
         for (i = 0; i < numProperties; ++i) {
             if (!parsedProperty[i]) {
                 RefPtr<CSSValue> val;
                 if (parseAnimationProperty(animationProperties.properties()[i], val, context)) {
                     parsedProperty[i] = found = true;
                     addAnimationValue(values[i], val.release());
                     break;
                 }
             }
-
-            // There are more values to process but 'none' or 'all' were already defined as the animation property, the declaration becomes invalid.
-            if (!context.animationPropertyKeywordAllowed() && context.hasCommittedFirstAnimation())
-                return false;
         }
 
         // if we didn't find at least one match, this is an
         // invalid shorthand and we have to ignore it
         if (!found)
             return false;
     }
 
     for (i = 0; i < numProperties; ++i) {
         // If we didn't find the property, set an intial value.
@@ skipping 8798 matching lines @@
 {
     // The tokenizer checks for the construct of an+b.
     // However, since the {ident} rule precedes the {nth} rule, some of those
     // tokens are identified as string literal. Furthermore we need to accept
     // "odd" and "even" which does not match to an+b.
     return equalIgnoringCase(token, "odd") || equalIgnoringCase(token, "even")
         || equalIgnoringCase(token, "n") || equalIgnoringCase(token, "-n");
 }
 
 }