Add our own (mojo::util::)ScopedFILE and replace uses of base::ScopedFILE with it.

mojo/edk/util/scoped_file.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 MOJO_EDK_UTIL_SCOPED_FILE_H_
+#define MOJO_EDK_UTIL_SCOPED_FILE_H_
+
+#include <stdio.h>
+
+#include "base/memory/scoped_ptr.h"
+
+namespace mojo {
+namespace util {
+namespace internal {
+
+// Functor for |ScopedFILE| (below).
+struct ScopedFILECloser {
+  inline void operator()(FILE* x) const {
+    if (x)
+      fclose(x);
+  }
+};
+
+}  // namespace internal
+
+// Automatically closes |FILE*|s.
+using ScopedFILE = scoped_ptr<FILE, internal::ScopedFILECloser>;
+
+}  // namespace util
+}  // namespace mojo
+
+#endif  // MOJO_EDK_UTIL_SCOPED_FILE_H_