DoResolveRelative must not parse mailto schemes as path URLs.

url/url_util.cc

Index: url/url_util.cc
diff --git a/url/url_util.cc b/url/url_util.cc
index 8ab889feff4a5f181ffb65935be758a69605daf5..49a20643b0ea1c91d64b5a0fcedc4cd5febba89d 100644
--- a/url/url_util.cc
+++ b/url/url_util.cc
@@ -245,8 +245,11 @@ bool DoResolveRelative(const char* base_spec,
       // The output_parsed is incorrect at this point (because it was built
       // based on base_parsed_authority instead of base_parsed) and needs to be
       // re-created.
-      ParsePathURL(output->data(), output->length(), true,
-                   output_parsed);
+      RawCanonOutputT<char> full_spec;
+      full_spec.Append(output->data(), output->length());
+      output->set_length(0);
+      DoCanonicalize(full_spec.data(), full_spec.length(), true,
+                     charset_converter, output, output_parsed);
       return did_resolve_succeed;
     }
   } else if (is_relative) {