[Autofill] Migrate ContentAutofillDriver<-->AutofillAgent IPCs to mojo.

components/autofill/content/renderer/password_autofill_agent.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/autofill/content/renderer/password_autofill_agent.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <string>
@@ skipping 541 matching lines @@
     : content::RenderFrameObserver(render_frame),
       logging_state_active_(false),
       was_username_autofilled_(false),
       was_password_autofilled_(false) {
   Send(new AutofillHostMsg_PasswordAutofillAgentConstructed(routing_id()));
 }
 
 PasswordAutofillAgent::~PasswordAutofillAgent() {
 }
 
+void PasswordAutofillAgent::SetAutofillAgent(AutofillAgent* autofill_agent) {
+  autofill_agent_ = autofill_agent;
+}
+
 PasswordAutofillAgent::PasswordValueGatekeeper::PasswordValueGatekeeper()
     : was_user_gesture_seen_(false) {
 }
 
 PasswordAutofillAgent::PasswordValueGatekeeper::~PasswordValueGatekeeper() {
 }
 
 void PasswordAutofillAgent::PasswordValueGatekeeper::RegisterElement(
     blink::WebInputElement* element) {
   if (was_user_gesture_seen_)
@@ skipping 832 matching lines @@
   blink::WebFrame* frame = user_input.document().frame();
   if (!frame)
     return false;
 
   blink::WebView* webview = frame->view();
   if (!webview)
     return false;
 
   if (user_input.isPasswordField() && !user_input.isAutofilled() &&
       !user_input.value().isEmpty()) {
-    Send(new AutofillHostMsg_HidePopup(routing_id()));
+    GetAutofillDriver()->HidePopup();
     return false;
   }
 
   FormData form;
   FormFieldData field;
   form_util::FindFormAndFieldForFormControlElement(user_input, &form, &field);
 
   int options = 0;
   if (show_all)
     options |= SHOW_ALL;
@@ skipping 48 matching lines @@
   provisionally_saved_form_ = std::move(password_form);
 }
 
 bool PasswordAutofillAgent::ProvisionallySavedPasswordIsValid() {
   return provisionally_saved_form_ &&
          !provisionally_saved_form_->username_value.empty() &&
          !(provisionally_saved_form_->password_value.empty() &&
          provisionally_saved_form_->new_password_value.empty());
 }
 
+const mojom::AutofillDriverPtr& PasswordAutofillAgent::GetAutofillDriver() {
+  DCHECK(autofill_agent_);
+  return autofill_agent_->GetAutofillDriver();
+}
+
 }  // namespace autofill