Refactor argument_functions option to use new function_map datastructure.
Refactor argument_functions option to use new function_map datastructure.

QafooLabs/php-profiler-extension,tideways/php-profiler-extension,tideways/php-profiler-extension,krakjoe/php-profiler-extension,QafooLabs/php-profiler-extension,lisa2lisa/php-profiler-extension,stof/php-profiler-extension,stof/php-profiler-extension,lisa2lisa/php-profiler-extension,krakjoe/php-profiler-extension