Merge "increase javac_filter line length limit to 2MB"

func process(r io.Reader, w io.Writer) error {

	scanner := bufio.NewScanner(r)

	// Some javac wrappers output the entire list of java files being

	// compiled on a single line, which can be very large, set the maximum

	// buffer size to 2MB.

	scanner.Buffer(nil, 2*1024*1024)

	for scanner.Scan() {

		processLine(w, scanner.Text())

	}