Rename __is_foo_iterator traits to reflect their Cpp17 nature.

With the upcoming introduction of iterator concepts in ranges,
the meaning of "__is_contiguous_iterator" changes drastically.

Currently we intend it to mean "does it have this iterator category",
but it could now also mean "does it meet the requirements of this
concept", and these can be different.

Cr-Mirrored-From: sso://chromium.googlesource.com/_direct/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: f82dba019253ced73ceadfde10e5f150bdb182f3
diff --git a/include/queue b/include/queue
index 97ec6f6..33c25e0 100644
--- a/include/queue
+++ b/include/queue
@@ -562,7 +562,7 @@
 template<class _InputIterator,
          class _Compare   = less<typename iterator_traits<_InputIterator>::value_type>,
          class _Container = vector<typename iterator_traits<_InputIterator>::value_type>,
-         class = typename enable_if< __is_input_iterator<_InputIterator>::value, nullptr_t>::type,
+         class = typename enable_if< __is_cpp17_input_iterator<_InputIterator>::value, nullptr_t>::type,
          class = typename enable_if<!__is_allocator<_Compare>::value, nullptr_t>::type,
          class = typename enable_if<!__is_allocator<_Container>::value, nullptr_t>::type
 >