Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/core/svg/properties/SVGPropertyHelper.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef SVGPropertyHelper_h
 #define SVGPropertyHelper_h
 
 #include "core/svg/properties/SVGProperty.h"
 
 namespace blink {
 
 template<typename Derived>
 class SVGPropertyHelper : public SVGPropertyBase {
 public:
     SVGPropertyHelper()
         : SVGPropertyBase(Derived::classType())
     {
     }
 
-    virtual PassRefPtrWillBeRawPtr<SVGPropertyBase> cloneForAnimation(const String& value) const
+    virtual RawPtr<SVGPropertyBase> cloneForAnimation(const String& value) const
     {
-        RefPtrWillBeRawPtr<Derived> property = Derived::create();
+        RawPtr<Derived> property = Derived::create();
         property->setValueAsString(value);
         return property.release();
     }
 };
 
 } // namespace blink
 
 #endif // SVGPropertyHelper_h