Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/modules/filesystem/DOMFileSystemBase.h

 /*
  * Copyright (C) 2010 Google Inc. 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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 107 matching lines @@
     bool waitForAdditionalResult(int callbacksId);
 
     DECLARE_VIRTUAL_TRACE();
 
 protected:
     DOMFileSystemBase(ExecutionContext*, const String& name, FileSystemType, const KURL& rootURL);
 
     friend class DOMFileSystemBaseTest;
     friend class DOMFileSystemSync;
 
-    RawPtrWillBeMember<ExecutionContext> m_context;
+    Member<ExecutionContext> m_context;
     String m_name;
     FileSystemType m_type;
     KURL m_filesystemRootURL;
     bool m_clonable;
 };
 
 inline bool operator==(const DOMFileSystemBase& a, const DOMFileSystemBase& b) { return a.name() == b.name() && a.type() == b.type() && a.rootURL() == b.rootURL(); }
 
 } // namespace blink
 
 #endif // DOMFileSystemBase_h