diff --git a/vendor/golang.org/x/net/context/ctxhttp/cancelreq.go b/vendor/golang.org/x/net/context/ctxhttp/cancelreq.go
new file mode 100644
index 0000000000..48610e3627
--- /dev/null
+++ b/vendor/golang.org/x/net/context/ctxhttp/cancelreq.go
@@ -0,0 +1,18 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build go1.5
+
+package ctxhttp
+
+import "net/http"
+
+func canceler(client *http.Client, req *http.Request) func() {
+	ch := make(chan struct{})
+	req.Cancel = ch
+
+	return func() {
+		close(ch)
+	}
+}
diff --git a/vendor/golang.org/x/net/context/ctxhttp/cancelreq_go14.go b/vendor/golang.org/x/net/context/ctxhttp/cancelreq_go14.go
new file mode 100644
index 0000000000..56bcbadb85
--- /dev/null
+++ b/vendor/golang.org/x/net/context/ctxhttp/cancelreq_go14.go
@@ -0,0 +1,23 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !go1.5
+
+package ctxhttp
+
+import "net/http"
+
+type requestCanceler interface {
+	CancelRequest(*http.Request)
+}
+
+func canceler(client *http.Client, req *http.Request) func() {
+	rc, ok := client.Transport.(requestCanceler)
+	if !ok {
+		return func() {}
+	}
+	return func() {
+		rc.CancelRequest(req)
+	}
+}
diff --git a/vendor/golang.org/x/net/context/ctxhttp/ctxhttp.go b/vendor/golang.org/x/net/context/ctxhttp/ctxhttp.go
new file mode 100644
index 0000000000..504dd63ed9
--- /dev/null
+++ b/vendor/golang.org/x/net/context/ctxhttp/ctxhttp.go
@@ -0,0 +1,79 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package ctxhttp provides helper functions for performing context-aware HTTP requests.
+package ctxhttp // import "golang.org/x/net/context/ctxhttp"
+
+import (
+	"io"
+	"net/http"
+	"net/url"
+	"strings"
+
+	"golang.org/x/net/context"
+)
+
+// Do sends an HTTP request with the provided http.Client and returns an HTTP response.
+// If the client is nil, http.DefaultClient is used.
+// If the context is canceled or times out, ctx.Err() will be returned.
+func Do(ctx context.Context, client *http.Client, req *http.Request) (*http.Response, error) {
+	if client == nil {
+		client = http.DefaultClient
+	}
+
+	// Request cancelation changed in Go 1.5, see cancelreq.go and cancelreq_go14.go.
+	cancel := canceler(client, req)
+
+	type responseAndError struct {
+		resp *http.Response
+		err  error
+	}
+	result := make(chan responseAndError, 1)
+
+	go func() {
+		resp, err := client.Do(req)
+		result <- responseAndError{resp, err}
+	}()
+
+	select {
+	case <-ctx.Done():
+		cancel()
+		return nil, ctx.Err()
+	case r := <-result:
+		return r.resp, r.err
+	}
+}
+
+// Get issues a GET request via the Do function.
+func Get(ctx context.Context, client *http.Client, url string) (*http.Response, error) {
+	req, err := http.NewRequest("GET", url, nil)
+	if err != nil {
+		return nil, err
+	}
+	return Do(ctx, client, req)
+}
+
+// Head issues a HEAD request via the Do function.
+func Head(ctx context.Context, client *http.Client, url string) (*http.Response, error) {
+	req, err := http.NewRequest("HEAD", url, nil)
+	if err != nil {
+		return nil, err
+	}
+	return Do(ctx, client, req)
+}
+
+// Post issues a POST request via the Do function.
+func Post(ctx context.Context, client *http.Client, url string, bodyType string, body io.Reader) (*http.Response, error) {
+	req, err := http.NewRequest("POST", url, body)
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("Content-Type", bodyType)
+	return Do(ctx, client, req)
+}
+
+// PostForm issues a POST request via the Do function.
+func PostForm(ctx context.Context, client *http.Client, url string, data url.Values) (*http.Response, error) {
+	return Post(ctx, client, url, "application/x-www-form-urlencoded", strings.NewReader(data.Encode()))
+}
diff --git a/vendor/vendor.json b/vendor/vendor.json
index acf3dba678..29e913322b 100644
--- a/vendor/vendor.json
+++ b/vendor/vendor.json
@@ -254,8 +254,13 @@
 		},
 		{
 			"path": "golang.org/x/net/context",
-			"revision": "db8e4de5b2d6653f66aea53094624468caad15d2",
-			"revisionTime": "2015-08-24T18:07:02+02:00"
+			"revision": "2cba614e8ff920c60240d2677bc019af32ee04e5",
+			"revisionTime": "2015-10-21T11:20:37-06:00"
+		},
+		{
+			"path": "golang.org/x/net/context/ctxhttp",
+			"revision": "2cba614e8ff920c60240d2677bc019af32ee04e5",
+			"revisionTime": "2015-10-21T11:20:37-06:00"
 		},
 		{
 			"path": "gopkg.in/fsnotify.v1",