Make DownloadHistory observe manager, items

chrome/chrome_browser.gypi

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': 'static_library',
@@ skipping 1026 matching lines @@
         'browser/download/download_crx_util.h',
         'browser/download/download_crx_util_android.cc',
         'browser/download/download_extensions.cc',
         'browser/download/download_extensions.h',
         'browser/download/download_file_picker.cc',
         'browser/download/download_file_picker.h',
         'browser/download/download_file_picker_chromeos.cc',
         'browser/download/download_file_picker_chromeos.h',
         'browser/download/download_history.cc',
         'browser/download/download_history.h',
+        'browser/download/download_persistent_store_info.cc',
+        'browser/download/download_persistent_store_info.h',
         'browser/download/download_item_model.cc',
         'browser/download/download_item_model.h',
         'browser/download/download_prefs.cc',
         'browser/download/download_prefs.h',
         'browser/download/download_query.cc',
         'browser/download/download_query.h',
         'browser/download/download_request_infobar_delegate.cc',
         'browser/download/download_request_infobar_delegate.h',
         'browser/download/download_request_limiter.cc',
         'browser/download/download_request_limiter.h',
@@ skipping 4510 matching lines @@
           'includes': [ '../build/jni_generator.gypi' ],
           'dependencies': [
             'android_jar_jni_headers',
           ],
         },
       ],
      },
     ],
   ],
 }