Done with a perl regex:

s/OUString\s*\(\s*RTL_CONSTASCII_USTRINGPARAM\s*\((\s*"[^")]*?"\s*)\)\s*\)/OUString\($1\)/gms

Change-Id: Idf28320817cdcbea6d0f7ec06a9bf51bd2c3b3ec
Reviewed-on: https://gerrit.libreoffice.org/2832Reviewed-by: Thomas Arnhold <thomas@arnhold.org>
Tested-by: Thomas Arnhold <thomas@arnhold.org>