[counting_allocator] Chrome changes.

base/allocator/allocator_shim.cc

Index: base/allocator/allocator_shim.cc
diff --git a/base/allocator/allocator_shim.cc b/base/allocator/allocator_shim.cc
index 7a5cfd6c6eeb1983553e9757a284b5ef96d52765..3abe2ac764d20abf823cf576b53f903949c017f6 100644
--- a/base/allocator/allocator_shim.cc
+++ b/base/allocator/allocator_shim.cc
@@ -173,6 +173,23 @@ ALWAYS_INLINE void* ShimCppNew(size_t size) {
   return ptr;
 }
 
+#if defined(_LIBCPP_COUNTING_ALLOCATOR)
+
+void* ShimTaggedCppNew(size_t size, std::new_tag tag) {
+  const allocator::AllocatorDispatch* const chain_head = GetChainHead();
+  void* ptr;
+  do {
+    if (chain_head->tagged_alloc_function) {
+      ptr = chain_head->tagged_alloc_function(chain_head, size, tag.value);
+    } else {
+      ptr = chain_head->alloc_function(chain_head, size, nullptr);
+    }
+  } while (!ptr && CallNewHandler(size));
+  return ptr;
+}
+
+#endif  // _LIBCPP_COUNTING_ALLOCATOR
+
 ALWAYS_INLINE void ShimCppDelete(void* address) {
   void* context = nullptr;
 #if defined(OS_MACOSX)