Add core plumbing for Instant Extended work

chrome/chrome_browser.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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': 'static_library',
@@ skipping 3227 matching lines @@
         'browser/ui/pdf/pdf_unsupported_feature.cc',
         'browser/ui/pdf/pdf_unsupported_feature.h',
         'browser/ui/prefs/prefs_tab_helper.cc',
         'browser/ui/prefs/prefs_tab_helper.h',
         'browser/ui/profile_error_dialog.cc',
         'browser/ui/profile_error_dialog.h',
         'browser/ui/sad_tab_helper.cc',
         'browser/ui/sad_tab_helper.h',
         'browser/ui/search/search.cc',
         'browser/ui/search/search.h',
+        'browser/ui/search/search_delegate.cc',
+        'browser/ui/search/search_delegate.h',
+        'browser/ui/search/search_model.cc',
+        'browser/ui/search/search_model.h',
+        'browser/ui/search/search_model_observer.h',
+        'browser/ui/search/search_model_observer_bridge.h',
+        'browser/ui/search/search_tab_helper.cc',
+        'browser/ui/search/search_tab_helper.h',
+        'browser/ui/search/search_types.h',
+        'browser/ui/search/search_ui.cc',
+        'browser/ui/search/search_ui.h',
         'browser/ui/search_engines/edit_search_engine_controller.cc',
         'browser/ui/search_engines/edit_search_engine_controller.h',
         'browser/ui/search_engines/keyword_editor_controller.cc',
         'browser/ui/search_engines/keyword_editor_controller.h',
         'browser/ui/search_engines/search_engine_tab_helper.cc',
         'browser/ui/search_engines/search_engine_tab_helper.h',
         'browser/ui/search_engines/search_engine_tab_helper_delegate.cc',
         'browser/ui/search_engines/search_engine_tab_helper_delegate.h',
         'browser/ui/search_engines/template_url_fetcher_ui_callbacks.cc',
         'browser/ui/search_engines/template_url_fetcher_ui_callbacks.h',
@@ skipping 1993 matching lines @@
         'browser/metrics/proto/study.proto',
       ],
       'variables': {
         'proto_in_dir': 'browser/metrics/proto',
         'proto_out_dir': 'chrome/browser/metrics/proto',
       },
       'includes': [ '../build/protoc.gypi' ]
     },
   ],
 }