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 123 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 119 matching lines @@
             '../third_party/icu/icu.gyp:icuuc',
             '../third_party/libjingle/libjingle.gyp:libjingle',
             '../third_party/libphonenumber/libphonenumber.gyp:libphonenumber',
             '../ui/ui.gyp:ui',
             '../url/url.gyp:url_lib',
             '../webkit/support/webkit_support.gyp:webkit_resources',
 
             'component_resources.gyp:component_resources',
           ],
           'sources': [
+            '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/full_wallet.cc',
             'autofill/content/browser/wallet/full_wallet.h',
             'autofill/content/browser/wallet/instrument.cc',
             'autofill/content/browser/wallet/instrument.h',
             'autofill/content/browser/wallet/required_action.cc',
@@ skipping 73 matching lines @@
           ],
           'variables': {
             'jni_gen_package': 'autofill',
           },
           'includes': [ '../build/jni_generator.gypi' ],
         },
       ],
     }],
   ],
 }