[Password Autofill] Don't fill fields with autocomplete="off".

chrome/renderer/autofill/password_autofill_agent_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 "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/test/base/chrome_render_view_test.h"
 #include "components/autofill/content/renderer/autofill_agent.h"
 #include "components/autofill/content/renderer/password_autofill_agent.h"
 #include "components/autofill/core/common/autofill_messages.h"
@@ skipping 263 matching lines @@
   username_element_.setValue(WebString::fromUTF8("bogus"));
 
   // Simulate the browser sending back the login info, it triggers the
   // autocomplete.
   SimulateOnFillPasswordForm(fill_data_);
 
   // Neither field should be autocompleted.
   CheckTextFieldsState("bogus", false, std::string(), false);
 }
 
+// Tests that changing the username does not fill a field specifying
+// autocomplete="off".
+TEST_F(PasswordAutofillAgentTest, NoInitialAutocompleteForAutocompleteOff) {
+  password_element_.setAttribute(WebString::fromUTF8("autocomplete"),
+                                 WebString::fromUTF8("off"));
+
+  // Simulate the browser sending back the login info, it triggers the
+  // autocomplete.
+  SimulateOnFillPasswordForm(fill_data_);
+
+  // Only the username should have been autocompleted.
+  // TODO(jcivelli): may be we should not event fill the username?
+  CheckTextFieldsState(kAliceUsername, true, std::string(), false);
+}
+
 TEST_F(PasswordAutofillAgentTest, NoAutocompleteForTextFieldPasswords) {
   const char kTextFieldPasswordFormHTML[] =
       "<FORM name='LoginTestForm' action='http://www.bidule.com'>"
       "  <INPUT type='text' id='username'/>"
       "  <INPUT type='text' id='password'/>"
       "  <INPUT type='submit' value='Login'/>"
       "</FORM>";
   LoadHTML(kTextFieldPasswordFormHTML);
 
   // Retrieve the input elements so the test can access them.
@@ skipping 202 matching lines @@
   // didSelectAutofillSuggestion on the renderer.
   autofill_agent_->didSelectAutofillSuggestion(username_element_,
                                                ASCIIToUTF16(kAliceUsername),
                                                WebKit::WebString(),
                                                0);
   // Autocomplete should not have kicked in.
   CheckTextFieldsState(std::string(), false, std::string(), false);
 }
 
 }  // namespace autofill