Fix DCHECK, memory leak, and refactor PasswordStore to use CancelableRequest

chrome/chrome_browser.gypi

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': '<(library)',
       'msvs_guid': '5BF908A7-68FB-4A4B-99E3-8C749F1FE4EA',
@@ skipping 1438 matching lines @@
         'browser/password_manager/native_backend_gnome_x.cc',
         'browser/password_manager/native_backend_gnome_x.h',
         'browser/password_manager/native_backend_kwallet_x.cc',
         'browser/password_manager/native_backend_kwallet_x.h',
         'browser/password_manager/password_form_manager.cc',
         'browser/password_manager/password_form_manager.h',
         'browser/password_manager/password_manager.cc',
         'browser/password_manager/password_manager.h',
         'browser/password_manager/password_store.cc',
         'browser/password_manager/password_store.h',
+        'browser/password_manager/password_store_consumer.cc',
+        'browser/password_manager/password_store_consumer.h',
         'browser/password_manager/password_store_default.cc',
         'browser/password_manager/password_store_default.h',
         'browser/password_manager/password_store_mac.cc',
         'browser/password_manager/password_store_mac.h',
         'browser/password_manager/password_store_mac_internal.h',
         'browser/password_manager/password_store_win.cc',
         'browser/password_manager/password_store_win.h',
         'browser/password_manager/password_store_x.cc',
         'browser/password_manager/password_store_x.h',
         'browser/password_manager_delegate_impl.cc',
@@ skipping 2869 matching lines @@
       ],
     },
   ],
 }
 
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