Abstract WebContents/NavigationController from core TabRestore code

components/sessions.gypi

 # Copyright 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.
 
 {
   'variables': {
     # Core sources shared by sessions_content and sessions_ios. These can't
     # be a separate shared library since one symbol is implemented higher up in
     # the sessions_content/ios layer.
     'sessions_core_sources': [
       'sessions/base_session_service.cc',
       'sessions/base_session_service.h',
       'sessions/base_session_service_commands.cc',
       'sessions/base_session_service_commands.h',
       'sessions/base_session_service_delegate.h',
+      'sessions/core/live_tab.h',
       'sessions/core/serialized_navigation_driver.h',
       'sessions/core/session_constants.cc',
       'sessions/core/session_constants.h',
       'sessions/core/tab_restore_service_client.cc',
       'sessions/core/tab_restore_service_client.h',
       'sessions/serialized_navigation_entry.cc',
       'sessions/serialized_navigation_entry.h',
       'sessions/session_backend.cc',
       'sessions/session_backend.h',
       'sessions/session_command.cc',
@@ skipping 57 matching lines @@
           'include_dirs': [
             '..',
           ],
           'defines': [
             'SESSIONS_IMPLEMENTATION',
           ],
           'sources': [
             # Note: sources list duplicated in GN build.
             '<@(sessions_core_sources)',
 
+            'sessions/content/content_live_tab.cc',
+            'sessions/content/content_live_tab.h',
             'sessions/content/content_serialized_navigation_builder.cc',
             'sessions/content/content_serialized_navigation_builder.h',
             'sessions/content/content_serialized_navigation_driver.cc',
             'sessions/content/content_serialized_navigation_driver.h',
             'sessions/content/content_tab_client_data.cc',
             'sessions/content/content_tab_client_data.h',
           ],
         },
       ],
     }, {  # OS==ios
@@ skipping 23 matching lines @@
             'sessions/ios/ios_serialized_navigation_builder.h',
             'sessions/ios/ios_serialized_navigation_driver.cc',
             'sessions/ios/ios_serialized_navigation_driver.h',
           ],
         },
       ],
     }],
   ],
 
 }