Shadows: crop corner tiles instead of hiding.

ui/wm/wm.gyp

 # 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': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 124 matching lines @@
       ],
       'sources': [
         'test/run_all_unittests.cc',
         'core/compound_event_filter_unittest.cc',
         'core/cursor_manager_unittest.cc',
         'core/focus_controller_unittest.cc',
         'core/input_method_event_filter_unittest.cc',
         'core/image_grid_unittest.cc',
         'core/nested_accelerator_controller_unittest.cc',
         'core/shadow_controller_unittest.cc',
+        'core/shadow_unittest.cc',
         'core/transient_window_manager_unittest.cc',
         'core/transient_window_stacking_client_unittest.cc',
         'core/user_activity_detector_unittest.cc',
         'core/visibility_controller_unittest.cc',
         'core/window_animations_unittest.cc',
         'core/window_util_unittest.cc',
       ],
     },
   ],
 }