Oilpan: Remove most WillBe types from the code base

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

Index: third_party/WebKit/Source/core/css/CSSStringValue.h
diff --git a/third_party/WebKit/Source/core/css/CSSStringValue.h b/third_party/WebKit/Source/core/css/CSSStringValue.h
index 06bc70e1f8317bb31e5105efe74e55500a0f02d6..109110dc6a8097421e9d08091f311887a92abd0e 100644
--- a/third_party/WebKit/Source/core/css/CSSStringValue.h
+++ b/third_party/WebKit/Source/core/css/CSSStringValue.h
@@ -13,9 +13,9 @@ namespace blink {
 
 class CSSStringValue : public CSSValue {
 public:
-    static PassRefPtrWillBeRawPtr<CSSStringValue> create(const String& str)
+    static RawPtr<CSSStringValue> create(const String& str)
     {
-        return adoptRefWillBeNoop(new CSSStringValue(str));
+        return (new CSSStringValue(str));
     }
 
     String value() const { return m_string; }