* completer.h (get_gdb_completer_word_break_characters): Delete.

    * completer.h (get_gdb_completer_word_break_characters): Delete.
        * completer.c: include language.h.
        (gdb_completer_word_break_characters): Delete.
        (get_gdb_completer_word_break_characters): Delete.
        (location_completer): Use the word break characters of the current
        language.
        (complete_line): Likewise.
        (line_completion_function): Likewise.
        (skip_quoted_chars): Likewise.
        * Makefile.in (completer.o): Add dependency on language.h.
        * top.c (init_main): Set the readline word break characters
        to GDB's default word break characters.