strings: delete Runes, Bytes

gofmt -w -r 'strings.Bytes(a) -> []byte(a)' src/cmd src/pkg test/bench
gofmt -w -r 'strings.Runes(a) -> []int(a)' src/cmd src/pkg test/bench
delete unused imports

R=r
CC=golang-dev
https://golang.org/cl/224062

handshake_messages.go

@@ -4,8 +4,6 @@
 
 package tls
 
-import "strings"
-
 type clientHelloMsg struct {
 	raw                []byte
 	major, minor       uint8
@@ -100,7 +98,7 @@ func (m *clientHelloMsg) marshal() []byte {
 		z[1] = 1
 		z[3] = byte(len(m.serverName) >> 8)
 		z[4] = byte(len(m.serverName))
-		copy(z[5:], strings.Bytes(m.serverName))
+		copy(z[5:], []byte(m.serverName))
 		z = z[l:]
 	}
 
@@ -280,7 +278,7 @@ func (m *serverHelloMsg) marshal() []byte {
 				l = 255
 			}
 			z[0] = byte(l)
-			copy(z[1:], strings.Bytes(v[0:l]))
+			copy(z[1:], []byte(v[0:l]))
 			z = z[1+l:]
 		}
 	}
@@ -548,7 +546,7 @@ func (m *nextProtoMsg) marshal() []byte {
 
 	y := x[4:]
 	y[0] = byte(l)
-	copy(y[1:], strings.Bytes(m.proto[0:l]))
+	copy(y[1:], []byte(m.proto[0:l]))
 	y = y[1+l:]
 	y[0] = byte(padding)
 

prf.go

@@ -10,7 +10,6 @@ import (
 	"crypto/sha1"
 	"hash"
 	"os"
-	"strings"
 )
 
 // Split a premaster secret in two as specified in RFC 4346, section 5.
@@ -70,10 +69,10 @@ const (
 	finishedVerifyLength = 12 // Length of verify_data in a Finished message.
 )
 
-var masterSecretLabel = strings.Bytes("master secret")
-var keyExpansionLabel = strings.Bytes("key expansion")
-var clientFinishedLabel = strings.Bytes("client finished")
-var serverFinishedLabel = strings.Bytes("server finished")
+var masterSecretLabel = []byte("master secret")
+var keyExpansionLabel = []byte("key expansion")
+var clientFinishedLabel = []byte("client finished")
+var serverFinishedLabel = []byte("server finished")
 
 // keysFromPreMasterSecret generates the connection keys from the pre master
 // secret, given the lengths of the MAC and cipher keys, as defined in RFC