tion plist path, relative to the
  build directory,
* |defines| is a list of preprocessor defines (empty if the plist
  shouldn't be preprocessed,
* |extra_env| is a dict of env variables that should be exported when
  invoking |mac_tool copy-info-plist|.

Only call this for mac bundle targets.

Args:
    product_dir: Path to the directory containing the output bundle,
        relative to the build directory.
    xcode_settings: The XcodeSettings of the current target.
    gyp_to_build_path: A function that converts paths relative to the
        current gyp file to paths relative to the build directory.
ÚINFOPLIST_FILENr`