vendor: update all dependencies

vendor/google.golang.org/api/gensupport/media.go

@@ -5,12 +5,14 @@
 package gensupport
 
 import (
+	"bytes"
 	"fmt"
 	"io"
 	"io/ioutil"
 	"mime/multipart"
 	"net/http"
 	"net/textproto"
+	"strings"
 
 	"google.golang.org/api/googleapi"
 )
@@ -251,11 +253,11 @@ func (mi *MediaInfo) UploadType() string {
 }
 
 // UploadRequest sets up an HTTP request for media upload. It adds headers
-// as necessary, and returns a replacement for the body.
-func (mi *MediaInfo) UploadRequest(reqHeaders http.Header, body io.Reader) (newBody io.Reader, cleanup func()) {
+// as necessary, and returns a replacement for the body and a function for http.Request.GetBody.
+func (mi *MediaInfo) UploadRequest(reqHeaders http.Header, body io.Reader) (newBody io.Reader, getBody func() (io.ReadCloser, error), cleanup func()) {
 	cleanup = func() {}
 	if mi == nil {
-		return body, cleanup
+		return body, nil, cleanup
 	}
 	var media io.Reader
 	if mi.media != nil {
@@ -269,7 +271,17 @@ func (mi *MediaInfo) UploadRequest(reqHeaders http.Header, body io.Reader) (newB
 		media, _, _, _ = mi.buffer.Chunk()
 	}
 	if media != nil {
+		fb := readerFunc(body)
+		fm := readerFunc(media)
 		combined, ctype := CombineBodyMedia(body, "application/json", media, mi.mType)
+		if fb != nil && fm != nil {
+			getBody = func() (io.ReadCloser, error) {
+				rb := ioutil.NopCloser(fb())
+				rm := ioutil.NopCloser(fm())
+				r, _ := CombineBodyMedia(rb, "application/json", rm, mi.mType)
+				return r, nil
+			}
+		}
 		cleanup = func() { combined.Close() }
 		reqHeaders.Set("Content-Type", ctype)
 		body = combined
@@ -277,7 +289,27 @@ func (mi *MediaInfo) UploadRequest(reqHeaders http.Header, body io.Reader) (newB
 	if mi.buffer != nil && mi.mType != "" && !mi.singleChunk {
 		reqHeaders.Set("X-Upload-Content-Type", mi.mType)
 	}
-	return body, cleanup
+	return body, getBody, cleanup
+}
+
+// readerFunc returns a function that always returns an io.Reader that has the same
+// contents as r, provided that can be done without consuming r. Otherwise, it
+// returns nil.
+// See http.NewRequest (in net/http/request.go).
+func readerFunc(r io.Reader) func() io.Reader {
+	switch r := r.(type) {
+	case *bytes.Buffer:
+		buf := r.Bytes()
+		return func() io.Reader { return bytes.NewReader(buf) }
+	case *bytes.Reader:
+		snapshot := *r
+		return func() io.Reader { r := snapshot; return &r }
+	case *strings.Reader:
+		snapshot := *r
+		return func() io.Reader { r := snapshot; return &r }
+	default:
+		return nil
+	}
 }
 
 // ResumableUpload returns an appropriately configured ResumableUpload value if the