Define HAS_FEATURE instead of __has_feature

base/bit_cast.h

Index: base/bit_cast.h
diff --git a/base/bit_cast.h b/base/bit_cast.h
index ad38238beb5c08902691dc3a9c8a67784714595c..a4830a62e92ac0797397bbb4e564a5ac0e11d09c 100644
--- a/base/bit_cast.h
+++ b/base/bit_cast.h
@@ -72,7 +72,7 @@ inline Dest bit_cast(const Source& source) {
                 "non-trivially-copyable bit_cast is undefined");
   static_assert(std::is_trivially_copyable<Source>::value,
                 "non-trivially-copyable bit_cast is undefined");
-#elif __has_feature(is_trivially_copyable)
+#elif HAS_FEATURE(is_trivially_copyable)
   // The compiler supports an equivalent intrinsic.
   static_assert(__is_trivially_copyable(Dest),
                 "non-trivially-copyable bit_cast is undefined");