Pass implementation object to supplemental classes by reference

Source/modules/crypto/WorkerGlobalScopeCrypto.cpp

 /*
  * Copyright (C) 2013 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 31 matching lines @@
 
 WorkerGlobalScopeCrypto::~WorkerGlobalScopeCrypto()
 {
 }
 
 const char* WorkerGlobalScopeCrypto::supplementName()
 {
     return "WorkerGlobalScopeCrypto";
 }
 
-WorkerGlobalScopeCrypto* WorkerGlobalScopeCrypto::from(WorkerSupplementable* context)
+WorkerGlobalScopeCrypto& WorkerGlobalScopeCrypto::from(WorkerSupplementable& context)
 {
     WorkerGlobalScopeCrypto* supplement = static_cast<WorkerGlobalScopeCrypto*>(WorkerSupplement::from(context, supplementName()));
     if (!supplement) {
         supplement = new WorkerGlobalScopeCrypto();
         provideTo(context, supplementName(), adoptPtr(supplement));
     }
-    return supplement;
+    return *supplement;
 }
 
-WorkerCrypto* WorkerGlobalScopeCrypto::crypto(WorkerSupplementable* context)
+WorkerCrypto* WorkerGlobalScopeCrypto::crypto(WorkerSupplementable& context)
 {
-    return WorkerGlobalScopeCrypto::from(context)->crypto();
+    return WorkerGlobalScopeCrypto::from(context).crypto();
 }
 
 WorkerCrypto* WorkerGlobalScopeCrypto::crypto() const
 {
     if (!m_crypto)
         m_crypto = WorkerCrypto::create();
     return m_crypto.get();
 }
 
 } // namespace WebCore