Use AutofillDriver* in ContentAutofillDriverFactory when possible

chrome/browser/autofill/form_structure_browsertest.cc

 // Copyright (c) 2012 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 <algorithm>
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/files/file_enumerator.h"
 #include "base/files/file_path.h"
@@ skipping 97 matching lines @@
 FormStructureBrowserTest::~FormStructureBrowserTest() {
 }
 
 void FormStructureBrowserTest::GenerateResults(const std::string& input,
                                                std::string* output) {
   ASSERT_NO_FATAL_FAILURE(ui_test_utils::NavigateToURL(browser(),
                                                        HTMLToDataURI(input)));
 
   content::WebContents* web_contents =
       browser()->tab_strip_model()->GetActiveWebContents();
-  ContentAutofillDriver* autofill_driver =
+  ContentAutofillDriver* autofill_driver = static_cast<ContentAutofillDriver*>(
       ContentAutofillDriverFactory::FromWebContents(web_contents)
-          ->DriverForFrame(web_contents->GetMainFrame());
+          ->DriverForFrame(web_contents->GetMainFrame()));
   ASSERT_NE(nullptr, autofill_driver);
   AutofillManager* autofill_manager = autofill_driver->autofill_manager();
   ASSERT_NE(nullptr, autofill_manager);
   const std::vector<std::unique_ptr<FormStructure>>& forms =
       autofill_manager->form_structures_;
   *output = FormStructuresToString(forms);
 }
 
 std::string FormStructureBrowserTest::FormStructuresToString(
     const std::vector<std::unique_ptr<FormStructure>>& forms) {
@@ skipping 15 matching lines @@
   // Prints the path of the test to be executed.
   LOG(INFO) << GetParam().MaybeAsASCII();
   RunOneDataDrivenTest(GetParam(), GetOutputDirectory(kTestName));
 }
 
 INSTANTIATE_TEST_CASE_P(AllForms,
                         FormStructureBrowserTest,
                         testing::ValuesIn(GetTestFiles()));
 
 }  // namespace autofill