Hook up the FocusController behind a flag.

ui/views/views.gyp

 # 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.
 {
   'variables': {
     'chromium_code': 1,
   },
   'target_defaults': {
     'conditions': [
       ['use_aura==1', {
@@ skipping 222 matching lines @@
         'controls/textfield/textfield_views_model.h',
         'controls/throbber.cc',
         'controls/throbber.h',
         'controls/tree/tree_view.h',
         'controls/tree/tree_view_controller.cc',
         'controls/tree/tree_view_controller.h',
         'controls/tree/tree_view_views.cc',
         'controls/tree/tree_view_views.h',
         'controls/tree/tree_view_win.cc',
         'controls/tree/tree_view_win.h',
+        'corewm/activation_change_shim.cc',
+        'corewm/activation_change_shim.h',
         'corewm/base_focus_rules.cc',
         'corewm/base_focus_rules.h',
         'corewm/compound_event_filter.cc',
         'corewm/compound_event_filter.h',
         'corewm/corewm_switches.cc',
         'corewm/corewm_switches.h',
         'corewm/focus_change_event.cc',
         'corewm/focus_change_event.h',
+        'corewm/focus_change_shim.cc',
+        'corewm/focus_change_shim.h',
         'corewm/focus_controller.cc',
         'corewm/focus_controller.h',
         'corewm/focus_rules.h',
         'corewm/image_grid.cc',
         'corewm/image_grid.h',
         'corewm/input_method_event_filter.cc',
         'corewm/input_method_event_filter.h',
         'corewm/shadow.cc',
         'corewm/shadow.h',
         'corewm/shadow_controller.cc',
@@ skipping 711 matching lines @@
           'sources/': [
             # This is needed because the aura rule strips it from the default
             # sources list.
             ['include', '^../../content/app/startup_helper_win.cc'],
           ],
         }],
       ],
     },  # target_name: views_examples_with_content_exe
   ],
 }