[counting_allocator] Chrome changes.

base/allocator/allocator_shim_override_cpp_symbols.h

Index: base/allocator/allocator_shim_override_cpp_symbols.h
diff --git a/base/allocator/allocator_shim_override_cpp_symbols.h b/base/allocator/allocator_shim_override_cpp_symbols.h
index 3313687250f4325111e8652cd6360284ab71b93f..b56f93d71632c23cf623837fc28c32598e418fd7 100644
--- a/base/allocator/allocator_shim_override_cpp_symbols.h
+++ b/base/allocator/allocator_shim_override_cpp_symbols.h
@@ -19,6 +19,12 @@ SHIM_ALWAYS_EXPORT void* operator new(size_t size) {
   return ShimCppNew(size);
 }
 
+#if defined(_LIBCPP_COUNTING_ALLOCATOR)
+SHIM_ALWAYS_EXPORT void* operator new(size_t size, std::new_tag tag) {
+    return ShimTaggedCppNew(size, tag);
+}
+#endif
+
 SHIM_ALWAYS_EXPORT void operator delete(void* p) __THROW {
   ShimCppDelete(p);
 }