update all vendored dependencies

vendor/cloud.google.com/go/storage/writer.go

@@ -19,6 +19,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"sync"
 	"unicode/utf8"
 
 	"golang.org/x/net/context"
@@ -68,8 +69,10 @@ type Writer struct {
 	pw     *io.PipeWriter
 
 	donec chan struct{} // closed after err and obj are set.
-	err   error
 	obj   *ObjectAttrs
+
+	mu  sync.Mutex
+	err error
 }
 
 func (w *Writer) open() error {
@@ -87,7 +90,7 @@ func (w *Writer) open() error {
 	w.opened = true
 
 	if w.ChunkSize < 0 {
-		return errors.New("storage: Writer.ChunkSize must non-negative")
+		return errors.New("storage: Writer.ChunkSize must be non-negative")
 	}
 	mediaOpts := []googleapi.MediaOption{
 		googleapi.ChunkSize(w.ChunkSize),
@@ -114,8 +117,10 @@ func (w *Writer) open() error {
 			call.ProgressUpdater(func(n, _ int64) { w.ProgressFunc(n) })
 		}
 		if err := setEncryptionHeaders(call.Header(), w.o.encryptionKey, false); err != nil {
+			w.mu.Lock()
 			w.err = err
-			pr.CloseWithError(w.err)
+			w.mu.Unlock()
+			pr.CloseWithError(err)
 			return
 		}
 		var resp *raw.Object
@@ -125,18 +130,27 @@ func (w *Writer) open() error {
 				call.UserProject(w.o.userProject)
 			}
 			setClientHeader(call.Header())
-			// We will only retry here if the initial POST, which obtains a URI for
-			// the resumable upload, fails with a retryable error. The upload itself
-			// has its own retry logic.
-			err = runWithRetry(w.ctx, func() error {
-				var err2 error
-				resp, err2 = call.Do()
-				return err2
-			})
+			// If the chunk size is zero, then no chunking is done on the Reader,
+			// which means we cannot retry: the first call will read the data, and if
+			// it fails, there is no way to re-read.
+			if w.ChunkSize == 0 {
+				resp, err = call.Do()
+			} else {
+				// We will only retry here if the initial POST, which obtains a URI for
+				// the resumable upload, fails with a retryable error. The upload itself
+				// has its own retry logic.
+				err = runWithRetry(w.ctx, func() error {
+					var err2 error
+					resp, err2 = call.Do()
+					return err2
+				})
+			}
 		}
 		if err != nil {
+			w.mu.Lock()
 			w.err = err
-			pr.CloseWithError(w.err)
+			w.mu.Unlock()
+			pr.CloseWithError(err)
 			return
 		}
 		w.obj = newObject(resp)
@@ -151,8 +165,11 @@ func (w *Writer) open() error {
 // use the error returned from Writer.Close to determine if
 // the upload was successful.
 func (w *Writer) Write(p []byte) (n int, err error) {
-	if w.err != nil {
-		return 0, w.err
+	w.mu.Lock()
+	werr := w.err
+	w.mu.Unlock()
+	if werr != nil {
+		return 0, werr
 	}
 	if !w.opened {
 		if err := w.open(); err != nil {
@@ -175,11 +192,15 @@ func (w *Writer) Close() error {
 		return err
 	}
 	<-w.donec
+	w.mu.Lock()
+	defer w.mu.Unlock()
 	return w.err
 }
 
 // CloseWithError aborts the write operation with the provided error.
 // CloseWithError always returns nil.
+//
+// Deprecated: cancel the context passed to NewWriter instead.
 func (w *Writer) CloseWithError(err error) error {
 	if !w.opened {
 		return nil