Use AutofillDriver* in ContentAutofillDriverFactory when possible

chrome/browser/ui/autofill/autofill_popup_controller_interactive_uitest.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 <memory>
 
 #include "base/macros.h"
 #include "build/build_config.h"
 #include "chrome/browser/ui/autofill/autofill_popup_view.h"
 #include "chrome/browser/ui/browser.h"
@@ skipping 61 matching lines @@
  public:
   AutofillPopupControllerBrowserTest() {}
   ~AutofillPopupControllerBrowserTest() override {}
 
   void SetUpOnMainThread() override {
     content::WebContents* web_contents =
         browser()->tab_strip_model()->GetActiveWebContents();
     ASSERT_TRUE(web_contents != NULL);
     Observe(web_contents);
 
-    ContentAutofillDriver* driver =
+    ContentAutofillDriver* driver = static_cast<ContentAutofillDriver*>(
         ContentAutofillDriverFactory::FromWebContents(web_contents)
-            ->DriverForFrame(web_contents->GetMainFrame());
+            ->DriverForFrame(web_contents->GetMainFrame()));
     autofill_external_delegate_.reset(
        new TestAutofillExternalDelegate(
            web_contents,
            driver->autofill_manager(),
            driver));
   }
 
   // Normally the WebContents will automatically delete the delegate, but here
   // the delegate is owned by this test, so we have to manually destroy.
   void RenderFrameDeleted(content::RenderFrameHost* rfh) override {
@@ skipping 46 matching lines @@
                        DeleteDelegateBeforePopupHidden){
   GenerateTestAutofillPopup(autofill_external_delegate_.get());
 
   // Delete the external delegate here so that is gets deleted before popup is
   // hidden. This can happen if the web_contents are destroyed before the popup
   // is hidden. See http://crbug.com/232475
   autofill_external_delegate_.reset();
 }
 
 }  // namespace autofill