[Autofill] Register AutofillDriver mojo interface earlier.

components/autofill/content/renderer/autofill_agent.cc

Index: components/autofill/content/renderer/autofill_agent.cc
diff --git a/components/autofill/content/renderer/autofill_agent.cc b/components/autofill/content/renderer/autofill_agent.cc
index 763e389bfec0827f40d0c0670bc822813006c917..729cbf60e2317e0c06cb96fdcf5b720886b4652f 100644
--- a/components/autofill/content/renderer/autofill_agent.cc
+++ b/components/autofill/content/renderer/autofill_agent.cc
@@ -771,7 +771,8 @@ void AutofillAgent::ajaxSucceeded() {
 }
 
 void AutofillAgent::ConnectToMojoAutofillDriverIfNeeded() {
-  if (mojo_autofill_driver_)
+  if (mojo_autofill_driver_.is_bound() &&

[vabr (Chromium), 2016/05/30 10:16:09]

Would this crash on every first call, because mojo_autofill_driver_ is null?

[leonhsl(Using Gerrit), 2016/05/30 10:52:01]

InterfacePtr is a wrapper class maybe containing one raw pointer of proxy bound
with one message pipe handle. Its null(uninitialized) state just means there has
no bound message pipe handle and the raw pointer is null, while the InterfacePtr
itself is a valid instance.

[vabr (Chromium), 2016/05/30 10:58:20]

Acknowledged, thanks for the explanation.

+      !mojo_autofill_driver_.encountered_error())
     return;
 
   render_frame()->GetServiceRegistry()->ConnectToRemoteService(