Refactor base/safe_numerics.h

base/numerics/safe_conversions_impl.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 BASE_SAFE_NUMERICS_IMPL_H_
-#define BASE_SAFE_NUMERICS_IMPL_H_
+#ifndef BASE_SAFE_CONVERSIONS_IMPL_H_
+#define BASE_SAFE_CONVERSIONS_IMPL_H_
 
 #include <limits>
 
 #include "base/macros.h"
 
 namespace base {
 namespace internal {
 
 enum DstSign {
   DST_UNSIGNED,
@@ skipping 155 matching lines @@
   COMPILE_ASSERT(std::numeric_limits<Src>::is_specialized,
                  argument_must_be_numeric);
   COMPILE_ASSERT(std::numeric_limits<Dst>::is_specialized,
                  result_must_be_numeric);
   return RangeCheckImpl<Dst, Src>::Check(value);
 }
 
 }  // namespace internal
 }  // namespace base
 
-#endif  // BASE_SAFE_NUMERICS_IMPL_H_
+#endif  // BASE_SAFE_CONVERSIONS_IMPL_H_