This one, however, does seem to be relevant:

# assertTrue is retarded, use the normal assert statement assert L

https://code.google.com/p/chromium/codesearch#chromium/src/t...

Along with:

// TODO(darin): Fix this retardation! return buf_->RemainingCapacity() <= (2 * net::kMaxBytesToSniff);

      // HACK: I'm at a loss about how to get the syntax checker to get
      // whether a template is externed or not. For the first pass here,
      // just do retarded string comparisons.
      if (TemplateDecl* decl = name.getAsTemplateDecl()) {
        std::string base_name = decl->getNameAsString();
        if (base_name == "basic_string")
          whitelisted_template = true;
      }

And a bunch of french language files

Those examples you have picked fit the same problem as the initial argument, yes. "retard" in French means "slow" or "late".

So hilarious that someone actually searched the codebase for 'retard' and then assumes it's a slur in french too.