Replace ContentSecurityPolicy::client() with a method returning an ExecutionContext

Source/core/dom/ExecutionContext.cpp

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * Copyright (C) 2012 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:
  * 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 236 matching lines @@
     return m_client->securityContext().contentSecurityPolicy();
 }
 
 const KURL& ExecutionContext::url() const
 {
     if (!m_client) {
         DEFINE_STATIC_LOCAL(KURL, emptyURL, ());
         return emptyURL;
     }
 
-    return m_client->virtualURL();
+    return virtualURL();
 }
 
 KURL ExecutionContext::completeURL(const String& url) const
 {
 
     if (!m_client) {
         DEFINE_STATIC_LOCAL(KURL, emptyURL, ());
         return emptyURL;
     }
 
-    return m_client->virtualCompleteURL(url);
+    return virtualCompleteURL(url);
 }
 
 void ExecutionContext::disableEval(const String& errorMessage)
 {
     if (!m_client)
         return;
     return m_client->disableEval(errorMessage);
 }
 
 DOMWindow* ExecutionContext::executingWindow() const
@@ skipping 59 matching lines @@
 
 void ExecutionContext::trace(Visitor* visitor)
 {
 #if ENABLE(OILPAN)
     visitor->trace(m_pendingExceptions);
 #endif
     Supplementable<WebCore::ExecutionContext>::trace(visitor);
 }
 
 } // namespace WebCore