Web Animations: Regularise unit test names

Source/core/animation/AnimatableLength.h

 /*
  * 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 131 matching lines @@
 
     bool m_isCalc;
 
     double m_number;
     NumberUnitType m_unitType;
 
     RefPtr<CSSCalcExpressionNode> m_calcExpression;
 
     mutable RefPtr<CSSPrimitiveValue> m_cachedCSSPrimitiveValue;
 
-    friend class AnimatableLengthTest;
+    friend class CoreAnimationAnimatableLengthTest;
 };
 
 inline const AnimatableLength* toAnimatableLength(const AnimatableValue* value)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(value && value->isLength());
     return static_cast<const AnimatableLength*>(value);
 }
 
 } // namespace WebCore
 
 #endif // AnimatableLength_h