go.benchmarks: use golang.org/x/... import paths

LGTM=bradfitz, rsc
R=rsc, bradfitz
CC=golang-codereviews
https://golang.org/cl/162700043
diff --git a/bench/bench.go b/bench/bench.go
index f0b8dbd..dd20b4b 100644
--- a/bench/bench.go
+++ b/bench/bench.go
@@ -5,12 +5,12 @@
 package main
 
 import (
-	"code.google.com/p/go.benchmarks/driver"
+	"golang.org/x/benchmarks/driver"
 
-	_ "code.google.com/p/go.benchmarks/build"
-	_ "code.google.com/p/go.benchmarks/garbage"
-	_ "code.google.com/p/go.benchmarks/http"
-	_ "code.google.com/p/go.benchmarks/json"
+	_ "golang.org/x/benchmarks/build"
+	_ "golang.org/x/benchmarks/garbage"
+	_ "golang.org/x/benchmarks/http"
+	_ "golang.org/x/benchmarks/json"
 )
 
 func main() {
diff --git a/build/build.go b/build/build.go
index 4d64e5d..34de8a4 100644
--- a/build/build.go
+++ b/build/build.go
@@ -9,7 +9,7 @@
 	"os"
 	"os/exec"
 
-	"code.google.com/p/go.benchmarks/driver"
+	"golang.org/x/benchmarks/driver"
 )
 
 func init() {
diff --git a/garbage/garbage.go b/garbage/garbage.go
index 571cd36..6bd0019 100644
--- a/garbage/garbage.go
+++ b/garbage/garbage.go
@@ -17,7 +17,7 @@
 	"sync"
 	"sync/atomic"
 
-	"code.google.com/p/go.benchmarks/driver"
+	"golang.org/x/benchmarks/driver"
 )
 
 func init() {
diff --git a/http/http.go b/http/http.go
index 810301c..b013f4e 100644
--- a/http/http.go
+++ b/http/http.go
@@ -14,7 +14,7 @@
 	"runtime"
 	"time"
 
-	"code.google.com/p/go.benchmarks/driver"
+	"golang.org/x/benchmarks/driver"
 )
 
 func init() {
diff --git a/json/json.go b/json/json.go
index 4c8d14b..2df233a 100644
--- a/json/json.go
+++ b/json/json.go
@@ -15,7 +15,7 @@
 	"io"
 	"io/ioutil"
 
-	"code.google.com/p/go.benchmarks/driver"
+	"golang.org/x/benchmarks/driver"
 )
 
 func init() {