diff --git a/content/context/google/google.go b/content/context/google/google.go
index 75442d0..e25cfc1 100644
--- a/content/context/google/google.go
+++ b/content/context/google/google.go
@@ -81,13 +81,11 @@
 // for f to exit, and returns ctx.Err. Otherwise, httpDo returns f's error.
 func httpDo(ctx context.Context, req *http.Request, f func(*http.Response, error) error) error {
 	// Run the HTTP request in a goroutine and pass the response to f.
-	tr := &http.Transport{}
-	client := &http.Client{Transport: tr}
 	c := make(chan error, 1)
-	go func() { c <- f(client.Do(req)) }()
+	req = req.WithContext(ctx)
+	go func() { c <- f(http.DefaultClient.Do(req)) }()
 	select {
 	case <-ctx.Done():
-		tr.CancelRequest(req)
 		<-c // Wait for f to return.
 		return ctx.Err()
 	case err := <-c: