Change the return type of WTF::bind() to |OwnPtr<Function>|

Source/platform/PermissionCallbacks.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef PermissionCallbacks_h
 #define PermissionCallbacks_h
 
 #include "platform/PlatformExport.h"
 #include "wtf/Functional.h"
 #include "wtf/Noncopyable.h"
+#include "wtf/OwnPtr.h"
 #include "wtf/PassOwnPtr.h"
 
 namespace blink {
 
 class PLATFORM_EXPORT PermissionCallbacks {
     WTF_MAKE_NONCOPYABLE(PermissionCallbacks);
 public:
-    static PassOwnPtr<PermissionCallbacks> create(const Closure& allowed, const Closure& denied);
+    static PassOwnPtr<PermissionCallbacks> create(PassOwnPtr<Closure> allowed, PassOwnPtr<Closure> denied);
     virtual ~PermissionCallbacks() { }
 
-    void onAllowed() { m_allowed(); }
-    void onDenied() { m_denied(); }
+    void onAllowed() { (*m_allowed)(); }
+    void onDenied() { (*m_denied)(); }
 
 private:
-    PermissionCallbacks(const Closure& allowed, const Closure& denied);
+    PermissionCallbacks(PassOwnPtr<Closure> allowed, PassOwnPtr<Closure> denied);
 
-    Closure m_allowed;
-    Closure m_denied;
+    OwnPtr<Closure> m_allowed;
+    OwnPtr<Closure> m_denied;
 };
 
 } // namespace blink
 
 #endif // PermissionCallbacks_h