Replace a WTF::Function conversion operator to be a function

third_party/WebKit/public/platform/functional/WebFunction.h

 // Copyright 2016 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 WebFunction_h
 #define WebFunction_h
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/macros.h"
@@ skipping 23 matching lines @@
 #endif
 
 public:
 #if BLINK_IMPLEMENTATION
     WebFunction()
     {
     }
 
     explicit WebFunction(std::unique_ptr<WTFFunction> c)
     {
-        m_callback = static_cast<base::Callback<R(Args...)>>(*c);
+        m_callback = convertToBaseCallback(std::move(c));
     }
 #endif
 
     WebFunction(WebFunction&& other)
     {
         *this = std::move(other);
     }
     WebFunction& operator=(WebFunction&& other)
     {
 #if DCHECK_IS_ON()
@@ skipping 24 matching lines @@
     base::Callback<R(Args...)> m_callback;
 
     DISALLOW_COPY_AND_ASSIGN(WebFunction);
 };
 
 using WebClosure = WebFunction<void()>;
 
 } // namespace blink
 
 #endif // WebClosure_h