[svg2] Make 'x' and 'y' presentation attributes

Source/core/css/resolver/AnimatedStyleBuilder.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 610 matching lines @@
         return;
     case CSSPropertyVisibility:
         style->setVisibility(toAnimatableVisibility(value)->visibility());
         return;
     case CSSPropertyZIndex:
         style->setZIndex(animatableValueRoundClampTo<int>(value));
         return;
     case CSSPropertyZoom:
         style->setZoom(clampTo<float>(toAnimatableDouble(value)->toDouble(), std::numeric_limits<float>::denorm_min()));
         return;
+    case CSSPropertyX:
+        style->setX(animatableValueToLength(value, state));
+        return;
+    case CSSPropertyY:
+        style->setY(animatableValueToLength(value, state));
+        return;
+
     default:
         ASSERT_NOT_REACHED();
     }
 }
 
 } // namespace blink