Oilpan: Remove most WillBe types from the code base

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

Index: third_party/WebKit/Source/core/css/CSSUnsetValue.h
diff --git a/third_party/WebKit/Source/core/css/CSSUnsetValue.h b/third_party/WebKit/Source/core/css/CSSUnsetValue.h
index d9be3264a37fc91a2c45862c6888d76e80f7b5fe..17f053ebede9217ebe60ca06bec23843c9d41b53 100644
--- a/third_party/WebKit/Source/core/css/CSSUnsetValue.h
+++ b/third_party/WebKit/Source/core/css/CSSUnsetValue.h
@@ -12,9 +12,9 @@ namespace blink {
 
 class CSSUnsetValue : public CSSValue {
 public:
-    static PassRefPtrWillBeRawPtr<CSSUnsetValue> create()
+    static RawPtr<CSSUnsetValue> create()
     {
-        return adoptRefWillBeNoop(new CSSUnsetValue);
+        return (new CSSUnsetValue);
     }
 
     String customCSSText() const;