Switch to std::is_fundamental<>.

src/base/macros.h

 // Copyright 2014 the V8 project 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 V8_BASE_MACROS_H_
 #define V8_BASE_MACROS_H_
 
 #include "src/base/compiler-specific.h"
 #include "src/base/format-macros.h"
 #include "src/base/logging.h"
@@ skipping 264 matching lines @@
   return AddressFrom<T>(OffsetFrom(x) & -m);
 }
 
 
 // Return the smallest multiple of m which is >= x.
 template <typename T>
 inline T RoundUp(T x, intptr_t m) {
   return RoundDown<T>(static_cast<T>(x + m - 1), m);
 }
 
-
-namespace v8 {
-namespace base {
-
-// TODO(yangguo): This is a poor man's replacement for std::is_fundamental,
-// which requires C++11. Switch to std::is_fundamental once possible.
-template <typename T>
-inline bool is_fundamental() {
-  return false;
-}
-
-template <>
-inline bool is_fundamental<uint8_t>() {
-  return true;
-}
-
-}  // namespace base
-}  // namespace v8
-
 #endif   // V8_BASE_MACROS_H_