Implement cycle window forward/backward by keyboard shortcuts.

ui/aura_shell/aura_shell.gyp

 # Copyright (c) 2011 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,
   },
 
   'targets': [
@@ skipping 143 matching lines @@
         'modal_container_layout_manager_unittest.cc',
         'run_all_unittests.cc',
         'shadow_controller_unittest.cc',
         'shell_accelerator_controller_unittest.cc',
         'shell_unittest.cc',
         'stacking_controller_unittest.cc',
         'test_suite.cc',
         'test_suite.h',
         'test/aura_shell_test_base.cc',
         'test/aura_shell_test_base.h',
+        'test/test_shell_delegate.cc',
+        'test/test_shell_delegate.h',
         'toplevel_layout_manager_unittest.cc',
         'toplevel_window_event_filter_unittest.cc',
         'workspace_controller_unittest.cc',
         'workspace/workspace_manager_unittest.cc',
 
         '<(SHARED_INTERMEDIATE_DIR)/ui/gfx/gfx_resources.rc',
         '<(SHARED_INTERMEDIATE_DIR)/ui/ui_resources/ui_resources.rc',
         '<(SHARED_INTERMEDIATE_DIR)/ui/ui_resources_standard/ui_resources_standard.rc',
       ],
     },
@@ skipping 28 matching lines @@
         'examples/widgets.cc',
         'examples/window_type_launcher.cc',
         'examples/window_type_launcher.h',
         '<(SHARED_INTERMEDIATE_DIR)/ui/gfx/gfx_resources.rc',
         '<(SHARED_INTERMEDIATE_DIR)/ui/ui_resources/ui_resources.rc',
         '<(SHARED_INTERMEDIATE_DIR)/ui/ui_resources_standard/ui_resources_standard.rc',
       ],
     },
   ],
 }