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

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 "base/bind.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
 #include "base/metrics/histogram.h"
@@ skipping 162 matching lines @@
     WebKit::WebInputElement element = it->second;
     // Don't fill a form that has pre-filled values distinct from the ones we
     // want to fill with.
     if (!element.value().isEmpty() && element.value() != data_map[it->first])
       return;
   }
 
   for (FormInputElementMap::iterator it = fe->input_elements.begin();
        it != fe->input_elements.end(); ++it) {
     WebKit::WebInputElement element = it->second;
-    if (!IsElementEditable(element))
-      continue;  // Don't fill uneditable fields.
+
+    // Don't fill uneditable fields or fields with autocomplete disabled.
+    if (!IsElementEditable(element) || !element.autoComplete())
+      continue;
 
     // TODO(tkent): Check maxlength and pattern.
     element.setValue(data_map[it->first]);
     element.setAutofilled(true);
     element.dispatchFormControlChangeEvent();
   }
 }
 
 void SetElementAutofilled(WebKit::WebInputElement* element, bool autofilled) {
   if (element->isAutofilled() == autofilled)
@@ skipping 489 matching lines @@
   LoginToPasswordInfoMap::iterator iter = login_to_password_info_.find(input);
   if (iter == login_to_password_info_.end())
     return false;
 
   *found_input = input;
   *found_password = iter->second;
   return true;
 }
 
 }  // namespace autofill