Autofill passwords after re-opening tab containing a login page.

chrome/renderer/autofill/password_autofill_manager.cc

 // Copyright (c) 2011 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 "chrome/renderer/autofill/password_autofill_manager.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
 #include "chrome/common/autofill_messages.h"
 #include "content/renderer/render_view.h"
@@ skipping 140 matching lines @@
   if (!fe->form_element.autoComplete())
     return;
 
   std::map<string16, string16> data_map;
   for (size_t i = 0; i < data.fields.size(); i++)
     data_map[data.fields[i].name] = data.fields[i].value;
 
   for (FormInputElementMap::iterator it = fe->input_elements.begin();
        it != fe->input_elements.end(); ++it) {
     WebKit::WebInputElement element = it->second;
-    // Don't fill a form that has pre-filled values.
-    if (!element.value().isEmpty())
+    // 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;
-    DCHECK(element.value().isEmpty());
     if (!IsElementEditable(element))
       continue;  // Don't fill uneditable fields.
 
     // TODO(tkent): Check maxlength and pattern.
     element.setValue(data_map[it->first]);
     element.setAutofilled(true);
     element.dispatchFormControlChangeEvent();
   }
 }
 
@@ skipping 388 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