Move observers out of automation_provider.cc to declutter the file.

chrome/chrome.gyp

 # Copyright (c) 2009 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.
 
 {
   'variables': {
     'chromium_code': 1,
 
     # Define the common dependencies that contain all the actual
     # Chromium functionality.  This list gets pulled in below by
@@ skipping 691 matching lines @@
         'browser/automation/automation_profile_impl.cc',
         'browser/automation/automation_profile_impl.h',
         'browser/automation/automation_provider_gtk.cc',
         'browser/automation/automation_provider_win.cc',
         'browser/automation/automation_provider.cc',
         'browser/automation/automation_provider.h',
         'browser/automation/automation_provider_list.cc',
         'browser/automation/automation_provider_list_generic.cc',
         'browser/automation/automation_provider_list_mac.mm',
         'browser/automation/automation_provider_list.h',
+        'browser/automation/automation_provider_observers.cc',
+        'browser/automation/automation_provider_observers.h',
         'browser/automation/automation_resource_message_filter.cc',
         'browser/automation/automation_resource_message_filter.h',
         'browser/automation/automation_resource_tracker.cc',
         'browser/automation/automation_resource_tracker.h',
         'browser/automation/automation_tab_tracker.h',
         'browser/automation/url_request_automation_job.cc',
         'browser/automation/url_request_automation_job.h',
         'browser/automation/automation_window_tracker.h',
         'browser/automation/extension_port_container.cc',
         'browser/automation/extension_port_container.h',
@@ skipping 5108 matching lines @@
               # Use outputs of this action as inputs for the main target build.
               # Seems as a misnomer but makes this happy on Linux (scons).
               'process_outputs_as_sources': 1,
             },
           ],  # 'actions'
         },
       ]
     }],
   ],  # 'conditions'
 }