Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/bindings/core/v8/NPV8Object.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009 Google Inc. All rights reserved.
  * Copyright (C) 2014 Opera Software ASA. 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.
@@ skipping 40 matching lines @@
 const WrapperTypeInfo* npObjectTypeInfo();
 
 // A V8NPObject is a NPObject which carries additional V8-specific information.
 // It is created with npCreateV8ScriptObject() and deallocated via the deallocate
 // method in the same way as other NPObjects.
 struct V8NPObject {
     WTF_MAKE_NONCOPYABLE(V8NPObject);
 public:
     NPObject object;
     v8::Persistent<v8::Object> v8Object;
-    RawPtrWillBeUntracedMember<LocalDOMWindow> rootObject;
+    UntracedMember<LocalDOMWindow> rootObject;
 };
 
 struct PrivateIdentifier {
     union {
         const NPUTF8* string;
         int32_t number;
     } value;
     bool isString;
 };
 
 CORE_EXPORT NPObject* npCreateV8ScriptObject(v8::Isolate*, NPP, v8::Local<v8::Object>, LocalDOMWindow*);
 
 NPObject* v8ObjectToNPObject(v8::Local<v8::Object>);
 
 bool isWrappedNPObject(v8::Local<v8::Object>);
 
 CORE_EXPORT V8NPObject* npObjectToV8NPObject(NPObject*);
 
 ScriptWrappable* npObjectToScriptWrappable(NPObject*);
 
 void disposeUnderlyingV8Object(v8::Isolate*, NPObject*);
 
 } // namespace blink
 
 #endif // NPV8Object_h