Transfer SecurityOrigin overrides to Workers.

Source/platform/weborigin/SecurityOrigin.h

 /*
  * Copyright (C) 2007, 2008 Apple 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 185 matching lines @@
     AtomicString toRawAtomicString() const;
 
     // This method checks for equality, ignoring the value of document.domain
     // (and whether it was set) but considering the host. It is used for postMessage.
     bool isSameSchemeHostPort(const SecurityOrigin*) const;
 
     bool needsDatabaseIdentifierQuirkForFiles() const { return m_needsDatabaseIdentifierQuirkForFiles; }
 
     static const String& urlWithUniqueSecurityOrigin();
 
+    // Transfer origin privileges from another security origin.
+    // The following privileges are currently copied over:
+    //
+    //   - Grant universal access.
+    //   - Grant loading of local resources.
+    //   - Use path-based file:// origins.
+    //
+    // Note: It is dangerous to change the privileges of an origin
+    // at any other time than during initialization.
+    void transferPrivilegesFrom(const SecurityOrigin&);
+
 private:
     SecurityOrigin();
     explicit SecurityOrigin(const KURL&);
     explicit SecurityOrigin(const SecurityOrigin*);
 
     // FIXME: Rename this function to something more semantic.
     bool passesFileCheck(const SecurityOrigin*) const;
     void buildRawString(StringBuilder&) const;
 
     String m_protocol;
     String m_host;
     String m_domain;
     String m_filePath;
     unsigned short m_port;
     bool m_isUnique;
     bool m_universalAccess;
     bool m_domainWasSetInDOM;
     bool m_canLoadLocalResources;
     bool m_enforceFilePathSeparation;
     bool m_needsDatabaseIdentifierQuirkForFiles;
 };
 
 } // namespace blink
 
 #endif // SecurityOrigin_h