Switch to std::is_fundamental<>.

src/base/macros.h

Index: src/base/macros.h
diff --git a/src/base/macros.h b/src/base/macros.h
index e3866173be622aca3652d2f5f5ece68b1fee96fd..33a0ef0f4f8fb937382a17001a0a3848260f9eab 100644
--- a/src/base/macros.h
+++ b/src/base/macros.h
@@ -282,23 +282,4 @@ 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_