Steps to Reproduce

1. In Chrome dev tools, add apis.google.com in "Network request blocking" tab
2. call: var user = await googleSignIn.signIn()

Nothing will happen and it will never return.

Expected results:

Expect an error.

Actual results:

Nothing, it never returns. eg:

print("before signIn");
user = await _googleSignIn.signIn();
print("after signIn");

"after signIn" never prints and no error is thrown.