Abstract WebContentsObserver from Autofill shared code

components/autofill.gypi

 # Copyright (c) 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.
 
 {
   'targets': [
     {
       # Private target only used in components/autofill.
       'target_name': 'autofill_regexes',
       'type': 'none',
@@ skipping 115 matching lines @@
             'autofill/browser/autocomplete_history_manager.h',
             'autofill/browser/autofill-inl.h',
             'autofill/browser/autofill_country.cc',
             'autofill/browser/autofill_country.h',
             'autofill/browser/autofill_data_model.cc',
             'autofill/browser/autofill_data_model.h',
             'autofill/browser/autofill_download.cc',
             'autofill/browser/autofill_download.h',
             'autofill/browser/autofill_download_url.cc',
             'autofill/browser/autofill_download_url.h',
+            'autofill/browser/autofill_driver.h',
             'autofill/browser/autofill_external_delegate.cc',
             'autofill/browser/autofill_external_delegate.h',
             'autofill/browser/autofill_field.cc',
             'autofill/browser/autofill_field.h',
             'autofill/browser/autofill_ie_toolbar_import_win.cc',
             'autofill/browser/autofill_ie_toolbar_import_win.h',
             'autofill/browser/autofill_manager.cc',
             'autofill/browser/autofill_manager.h',
             'autofill/browser/autofill_manager_delegate.h',
             'autofill/browser/autofill_manager_test_delegate.h',
@@ skipping 127 matching lines @@
           ],
           'sources': [
             'autofill/content/browser/autocheckout/whitelist_manager.cc',
             'autofill/content/browser/autocheckout/whitelist_manager.h',
             'autofill/content/browser/autocheckout_manager.cc',
             'autofill/content/browser/autocheckout_manager.h',
             'autofill/content/browser/autocheckout_page_meta_data.cc',
             'autofill/content/browser/autocheckout_page_meta_data.h',
             'autofill/content/browser/autocheckout_request_manager.cc',
             'autofill/content/browser/autocheckout_request_manager.h',
+            'autofill/content/browser/autofill_driver_impl.cc',
+            'autofill/content/browser/autofill_driver_impl.h',
             'autofill/content/browser/risk/fingerprint.cc',
             'autofill/content/browser/risk/fingerprint.h',
             'autofill/content/browser/wallet/encryption_escrow_client.cc',
             'autofill/content/browser/wallet/encryption_escrow_client.h',
             'autofill/content/browser/wallet/encryption_escrow_client_observer.h',
             'autofill/content/browser/wallet/form_field_error.cc',
             'autofill/content/browser/wallet/form_field_error.h',
             'autofill/content/browser/wallet/full_wallet.cc',
             'autofill/content/browser/wallet/full_wallet.h',
             'autofill/content/browser/wallet/instrument.cc',
@@ skipping 75 matching lines @@
           ],
           'variables': {
             'jni_gen_package': 'autofill',
           },
           'includes': [ '../build/jni_generator.gypi' ],
         },
       ],
     }],
   ],
 }