* Changes check_chromium_src warning into an error.
Changes the warning that catches use of defined symbols in the override,
but not in the original file into an error. All uses of such symbols
should be marked with // CHROMIUM_SRC_INTERNAL_USE comment.
* Removes symbol exclusions section of the config file.
All symbols that don't conform to check_chromium_src rules should be marked with // CHROMIUM_SRC_NOLINT comment.
Max Karolinskiy
efa79dfdd1