replace custom findByte with bytes.IndexByte

R=rsc
https://golang.org/cl/156093

src/pkg/Make.deps

 archive/tar.install: bytes.install io.install os.install strconv.install strings.install
-asn1.install: fmt.install os.install reflect.install strconv.install strings.install time.install
+asn1.install: bytes.install fmt.install io.install os.install reflect.install strconv.install strings.install time.install
 big.install: rand.install
 bignum.install: fmt.install
-bufio.install: io.install os.install strconv.install utf8.install
+bufio.install: bytes.install io.install os.install strconv.install utf8.install
 bytes.install: os.install unicode.install utf8.install
-compress/flate.install: bufio.install bytes.install io.install math.install os.install sort.install strconv.install
-compress/gzip.install: bufio.install compress/flate.install hash/crc32.install hash.install io.install os.install
-compress/zlib.install: bufio.install compress/flate.install hash/adler32.install hash.install io.install os.install
+compress/flate.install: bufio.install io.install math.install os.install sort.install strconv.install
+compress/gzip.install: bufio.install compress/flate.install hash.install hash/crc32.install io.install os.install
+compress/zlib.install: bufio.install compress/flate.install hash.install hash/adler32.install io.install os.install
 container/heap.install: sort.install
 container/list.install:
 container/ring.install:
@@ -16,19 +16,19 @@ crypto/block.install: fmt.install hash.install io.install os.install strconv.ins
 crypto/hmac.install: crypto/md5.install crypto/sha1.install hash.install os.install
 crypto/md5.install: hash.install os.install
 crypto/rc4.install: os.install strconv.install
-crypto/rsa.install: big.install bytes.install crypto/subtle.install hash.install io.install os.install
+crypto/rsa.install: big.install crypto/subtle.install hash.install io.install os.install
 crypto/sha1.install: hash.install os.install
 crypto/subtle.install:
-crypto/tls.install: bufio.install bytes.install container/list.install crypto/hmac.install crypto/md5.install crypto/rc4.install crypto/rsa.install crypto/sha1.install crypto/subtle.install crypto/x509.install fmt.install hash.install io.install net.install os.install strings.install time.install
-crypto/x509.install: asn1.install big.install container/vector.install crypto/rsa.install os.install time.install
+crypto/tls.install: bufio.install container/list.install crypto/hmac.install crypto/md5.install crypto/rc4.install crypto/rsa.install crypto/sha1.install crypto/subtle.install fmt.install hash.install io.install net.install os.install strings.install time.install
+crypto/x509.install: asn1.install big.install container/vector.install crypto/rsa.install crypto/sha1.install hash.install os.install strings.install time.install
 debug/dwarf.install: encoding/binary.install os.install strconv.install
 debug/macho.install: bytes.install debug/dwarf.install encoding/binary.install fmt.install io.install os.install strconv.install
 debug/elf.install: bytes.install debug/dwarf.install encoding/binary.install fmt.install io.install os.install strconv.install
 debug/gosym.install: encoding/binary.install fmt.install os.install strconv.install strings.install
 debug/proc.install: container/vector.install fmt.install io.install os.install runtime.install strconv.install strings.install sync.install syscall.install
 ebnf.install: container/vector.install go/scanner.install go/token.install os.install strconv.install unicode.install utf8.install
-encoding/ascii85.install: bytes.install io.install os.install strconv.install
-encoding/base64.install: bytes.install io.install os.install strconv.install
+encoding/ascii85.install: io.install os.install strconv.install
+encoding/base64.install: io.install os.install strconv.install
 encoding/binary.install: io.install math.install os.install reflect.install
 encoding/git85.install: bytes.install io.install os.install strconv.install
 encoding/hex.install: os.install strconv.install strings.install
@@ -52,7 +52,7 @@ hash/adler32.install: hash.install os.install
 hash/crc32.install: hash.install os.install
 http.install: bufio.install bytes.install container/vector.install fmt.install io.install log.install net.install os.install path.install strconv.install strings.install utf8.install
 image.install:
-image/png.install: bufio.install compress/zlib.install hash/crc32.install hash.install image.install io.install os.install strconv.install
+image/png.install: bufio.install compress/zlib.install hash.install hash/crc32.install image.install io.install os.install strconv.install
 io.install: bytes.install os.install sort.install strings.install sync.install
 json.install: bytes.install container/vector.install fmt.install math.install reflect.install strconv.install strings.install utf8.install
 log.install: fmt.install io.install os.install runtime.install time.install
@@ -76,7 +76,7 @@ syscall.install: sync.install
 tabwriter.install: bytes.install container/vector.install io.install os.install utf8.install
 template.install: bytes.install container/vector.install fmt.install io.install os.install reflect.install runtime.install strings.install
 testing.install: flag.install fmt.install os.install runtime.install utf8.install
-testing/iotest.install: bytes.install io.install log.install os.install
+testing/iotest.install: io.install log.install os.install
 testing/quick.install: flag.install fmt.install math.install os.install rand.install reflect.install strings.install
 testing/script.install: fmt.install os.install rand.install reflect.install strings.install
 time.install: io.install once.install os.install syscall.install

src/pkg/bufio/bufio.go

@@ -8,6 +8,7 @@
 package bufio
 
 import (
+	"bytes";
 	"io";
 	"os";
 	"strconv";
@@ -193,17 +194,6 @@ func (b *Reader) ReadRune() (rune int, size int, err os.Error) {
 	return rune, size, nil;
 }
 
-// Helper function: look for byte c in array p,
-// returning its index or -1.
-func findByte(p []byte, c byte) int {
-	for i := 0; i < len(p); i++ {
-		if p[i] == c {
-			return i
-		}
-	}
-	return -1;
-}
-
 // Buffered returns the number of bytes that can be read from the current buffer.
 func (b *Reader) Buffered() int	{ return b.w - b.r }
 
@@ -219,7 +209,7 @@ func (b *Reader) Buffered() int	{ return b.w - b.r }
 // ReadSlice returns err != nil if and only if line does not end in delim.
 func (b *Reader) ReadSlice(delim byte) (line []byte, err os.Error) {
 	// Look in buffer.
-	if i := findByte(b.buf[b.r:b.w], delim); i >= 0 {
+	if i := bytes.IndexByte(b.buf[b.r:b.w], delim); i >= 0 {
 		line1 := b.buf[b.r : b.r+i+1];
 		b.r += i + 1;
 		return line1, nil;
@@ -237,7 +227,7 @@ func (b *Reader) ReadSlice(delim byte) (line []byte, err os.Error) {
 		b.fill();
 
 		// Search new part of buffer
-		if i := findByte(b.buf[n:b.w], delim); i >= 0 {
+		if i := bytes.IndexByte(b.buf[n:b.w], delim); i >= 0 {
 			line := b.buf[0 : n+i+1];
 			b.r = n + i + 1;
 			return line, nil;