Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/core/css/KeyframeStyleRuleCSSStyleDeclaration.h

 // Copyright 2015 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 KeyframeStyleRuleCSSStyleDeclaration_h
 #define KeyframeStyleRuleCSSStyleDeclaration_h
 
 #include "core/css/PropertySetCSSStyleDeclaration.h"
 
 namespace blink {
 
 class CSSKeyframeRule;
 
 class KeyframeStyleRuleCSSStyleDeclaration final : public StyleRuleCSSStyleDeclaration {
 public:
-    static PassRefPtrWillBeRawPtr<KeyframeStyleRuleCSSStyleDeclaration> create(MutableStylePropertySet& propertySet, CSSKeyframeRule* parentRule)
+    static RawPtr<KeyframeStyleRuleCSSStyleDeclaration> create(MutableStylePropertySet& propertySet, CSSKeyframeRule* parentRule)
     {
-        return adoptRefWillBeNoop(new KeyframeStyleRuleCSSStyleDeclaration(propertySet, parentRule));
+        return (new KeyframeStyleRuleCSSStyleDeclaration(propertySet, parentRule));
     }
 
 private:
     KeyframeStyleRuleCSSStyleDeclaration(MutableStylePropertySet&, CSSKeyframeRule*);
 
     void didMutate(MutationType) override;
 };
 
 } // namespace blink
 
 #endif