my_error(ER_TOO_BIG_ROWSIZE, ...).  Otherwise, MySQL can report
"Got error 139 from storage engine" instead of the appropriate
error message.

ha_innobase::index_read(), ha_innobase::general_fetch():
Replace if-else if-else with switch-case.
Pass table->flags to convert_error_code_to_mysql().

innodb_check_for_record_too_big_error().  Remove.  This code belongs to
convert_error_code_to_mysql().

convert_error_code_to_mysql(): Add the parameter "flags", for table flags.
Translate DB_TOO_BIG_RECORD into ER_TOO_BIG_ROWSIZE.

create_index(): Add the parameter "flags".

create_clustered_index_when_no_primary(): Replace the parameter "comp"
with "flags".

innobase_drop_database(): Remove the #ifdef'd-out call to 
convert_error_code_to_mysql().