chat: Increase the deadline for a test.

The deadline is sometimes exceeded when running race on jenkins.

Change-Id: Id1f74c842f712dceb6b90b35b0d3dac7060a2c3b
diff --git a/clients/shell/go/src/v.io/x/chat/channel_test.go b/clients/shell/go/src/v.io/x/chat/channel_test.go
index 68181b7..50506c3 100644
--- a/clients/shell/go/src/v.io/x/chat/channel_test.go
+++ b/clients/shell/go/src/v.io/x/chat/channel_test.go
@@ -197,7 +197,7 @@
 	}()
 
 	select {
-	case <-time.After(1 * time.Second):
+	case <-time.After(10 * time.Second):
 		t.Errorf("Timeout waiting for message to be received.")
 	case m := <-channel.messages:
 		if m.Text != message {