Make Ctor/Dtor of ExecutionContext protected.

Source/core/dom/ExecutionContext.h

 /*
  * 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 48 matching lines @@
 class ScriptState;
 class PublicURLManager;
 class SecurityOrigin;
 class ScriptCallStack;
 
 class ExecutionContext
     : public WillBeGarbageCollectedMixin
     , public LifecycleContext<ExecutionContext>
     , public Supplementable<ExecutionContext> {
 public:
-    ExecutionContext();
-    virtual ~ExecutionContext();
     virtual void trace(Visitor*);
 
     // Delegating to ExecutionContextClient
     bool isDocument() const { return m_client && m_client->isDocument(); }
     bool isWorkerGlobalScope() const { return m_client && m_client->isWorkerGlobalScope(); }
     bool isJSExecutionForbidden() { return m_client && m_client->isJSExecutionForbidden(); }
     SecurityOrigin* securityOrigin() const;
     ContentSecurityPolicy* contentSecurityPolicy() const;
     const KURL& url() const;
     KURL completeURL(const String& url) const;
@@ skipping 48 matching lines @@
 
     SandboxFlags sandboxFlags() const { return m_sandboxFlags; }
     bool isSandboxed(SandboxFlags mask) const { return m_sandboxFlags & mask; }
     void enforceSandboxFlags(SandboxFlags mask);
 
     PassOwnPtr<LifecycleNotifier<ExecutionContext> > createLifecycleNotifier();
 
     virtual EventQueue* eventQueue() const = 0;
 
 protected:
+    ExecutionContext();
+    virtual ~ExecutionContext();
+
     void setClient(ExecutionContextClient* client) { m_client = client; }
 
     virtual const KURL& virtualURL() const = 0;
     virtual KURL virtualCompleteURL(const String&) const = 0;
 
     ContextLifecycleNotifier& lifecycleNotifier();
 
 private:
     friend class DOMTimer; // For installNewTimeout() and removeTimeoutByID() below.
 
@@ skipping 27 matching lines @@
 
     // The location of this member is important; to make sure contextDestroyed() notification on
     // ExecutionContext's members (notably m_timeouts) is called before they are destructed,
     // m_lifecycleNotifer should be placed *after* such members.
     OwnPtr<ContextLifecycleNotifier> m_lifecycleNotifier;
 };
 
 } // namespace WebCore
 
 #endif // ExecutionContext_h