Introduce content::PageState (again).

content/content_common.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.
 
 {
   'dependencies': [
     '../base/base.gyp:base',
     '../build/temp_gyp/googleurl.gyp:googleurl',
     '../components/tracing.gyp:tracing',
     '../media/media.gyp:media',
@@ skipping 37 matching lines @@
     'public/common/geoposition.cc',
     'public/common/geoposition.h',
     'public/common/gpu_memory_stats.cc',
     'public/common/gpu_memory_stats.h',
     'public/common/injection_test_mac.h',
     'public/common/injection_test_win.h',
     'public/common/javascript_message_type.h',
     'public/common/main_function_params.h',
     'public/common/media_stream_request.cc',
     'public/common/media_stream_request.h',
+    'public/common/page_state.cc',
+    'public/common/page_state_ios.cc',
+    'public/common/page_state_webkit.cc',
+    'public/common/page_state.h',
     'public/common/page_transition_types.cc',
     'public/common/page_transition_types.h',
     'public/common/page_transition_types_list.h',
     'public/common/page_type.h',
     'public/common/page_zoom.h',
     'public/common/password_form.cc',
     'public/common/password_form.h',
     'public/common/pepper_plugin_info.cc',
     'public/common/pepper_plugin_info.h',
     'public/common/process_type.h',
@@ skipping 297 matching lines @@
       'sources/': [
         # iOS only needs a small portion of content; exclude all the
         # implementation, and re-include what is used.
         ['exclude', '\\.(cc|mm)$'],
         ['include', '_ios\\.(cc|mm)$'],
         ['include', '^public/common/content_client\\.cc$'],
         ['include', '^public/common/content_constants\\.cc$'],
         ['include', '^public/common/content_switches\\.cc$'],
         ['include', '^public/common/frame_navigate_params\\.cc$'],
         ['include', '^public/common/media_stream_request\\.cc$'],
+        ['include', '^public/common/page_state\\.cc$'],
         ['include', '^public/common/page_transition_types\\.cc$'],
         ['include', '^public/common/password_form\\.cc$'],
         ['include', '^public/common/speech_recognition_result\\.cc$'],
         ['include', '^public/common/ssl_status\\.cc$'],
         ['include', '^public/common/url_constants\\.cc$'],
         ['include', '^common/content_paths\\.cc$'],
         ['include', '^common/media/media_stream_options\\.cc$'],
         ['include', '^common/net/url_fetcher\\.cc$'],
         ['include', '^common/net/url_request_user_data\\.cc$'],
         ['include', '^common/savable_url_schemes\\.cc$'],
@@ skipping 173 matching lines @@
         '..\\third_party\\directxsdk\\files\\Redist\\<(input)',
         '<(output)',
         '<(PRODUCT_DIR)',
         ],
         'msvs_cygwin_shell': 1,
       },
      ]
     }],
   ],
 }