Merge "Clarify default tidy check lists."

# or google-runtime-references.

DEFAULT_GLOBAL_TIDY_CHECKS := \

  $(subst $(space),, \

    -*,google*,performance*,misc-macro-parentheses \

    ,-google-readability*,-google-runtime-references \

    -*,google* \

    ,misc-macro-parentheses \

    ,performance* \

    ,-google-readability* \

    ,-google-runtime-references \

  )

# There are too many clang-tidy warnings in external and vendor projects.

# Enable only some google checks for these projects.

DEFAULT_EXTERNAL_VENDOR_TIDY_CHECKS := \

  $(subst $(space),, \

    -*,google*,-google-build-using-namespace \

    ,-google-readability*,-google-runtime-references \

    ,-google-explicit-constructor,-google-runtime-int \

    -*,google* \

    ,-google-build-using-namespace \

    ,-google-default-arguments \

    ,-google-explicit-constructor \

    ,-google-readability* \

    ,-google-runtime-int \

    ,-google-runtime-references \

  )

# Every word in DEFAULT_LOCAL_TIDY_CHECKS list has the following format: