Some things in Blink are declared in the global namespace and therefore won't be recognized as belonging to Blink by the automatic rename tool.  Example:

third_party/WebKit/Source/core/xml/XPathParser.cpp

This isn't technically blocking the automatic renaming (e.g.  issue 578344 ) - we can fix a few of these things manually.  OTOH, we should recognize this as a limitation of the automatic renaming and as something that might need to be fixed in a manual follow-up.