Remove base::enable_if

base/numerics/safe_conversions.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_NUMERICS_SAFE_CONVERSIONS_H_
 #define BASE_NUMERICS_SAFE_CONVERSIONS_H_
 
 #include <limits>
+#include <type_traits>
 
 #include "base/logging.h"
 #include "base/numerics/safe_conversions_impl.h"
 
 namespace base {
 
 // Convenience function that returns true if the supplied value is in range
 // for the destination type.
 template <typename Dst, typename Src>
 inline bool IsValueInRangeForNumericType(Src value) {
   return internal::DstRangeRelationToSrcRange<Dst>(value) ==
          internal::RANGE_VALID;
 }
 
 // Convenience function for determining if a numeric value is negative without
 // throwing compiler warnings on: unsigned(value) < 0.
 template <typename T>
-typename enable_if<std::numeric_limits<T>::is_signed, bool>::type
+typename std::enable_if<std::numeric_limits<T>::is_signed, bool>::type
 IsValueNegative(T value) {
   static_assert(std::numeric_limits<T>::is_specialized,
                 "Argument must be numeric.");
   return value < 0;
 }
 
 template <typename T>
-typename enable_if<!std::numeric_limits<T>::is_signed, bool>::type
-IsValueNegative(T) {
+typename std::enable_if<!std::numeric_limits<T>::is_signed, bool>::type
+    IsValueNegative(T) {
   static_assert(std::numeric_limits<T>::is_specialized,
                 "Argument must be numeric.");
   return false;
 }
 
 // checked_cast<> is analogous to static_cast<> for numeric types,
 // except that it CHECKs that the specified numeric conversion will not
 // overflow or underflow. NaN source will always trigger a CHECK.
 template <typename Dst, typename Src>
 inline Dst checked_cast(Src value) {
@@ skipping 88 matching lines @@
  private:
   T value_;
 };
 
 // Explicitly make a shorter size_t typedef for convenience.
 typedef StrictNumeric<size_t> SizeT;
 
 }  // namespace base
 
 #endif  // BASE_NUMERICS_SAFE_CONVERSIONS_H_