Rename StackingClient -> WindowTreeClient

ui/aura/aura.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,
   },
   'targets': [
     {
@@ skipping 44 matching lines @@
         'client/drag_drop_delegate.cc',
         'client/drag_drop_delegate.h',
         'client/event_client.cc',
         'client/event_client.h',
         'client/focus_change_observer.cc',
         'client/focus_change_observer.h',
         'client/focus_client.cc',
         'client/focus_client.h',
         'client/screen_position_client.cc',
         'client/screen_position_client.h',
-        'client/stacking_client.cc',
-        'client/stacking_client.h',
         'client/tooltip_client.cc',
         'client/tooltip_client.h',
         'client/user_action_client.cc',
         'client/user_action_client.h',
         'client/visibility_client.cc',
         'client/visibility_client.h',
         'client/window_move_client.cc',
         'client/window_move_client.h',
+        'client/window_tree_client.cc',
+        'client/window_tree_client.h',
         'client/window_types.h',
         'device_list_updater_aurax11.cc',
         'device_list_updater_aurax11.h',
         'dispatcher_win.cc',
         'env.cc',
         'env.h',
         'env_observer.h',
         'input_state_lookup.cc',
         'input_state_lookup.h',
         'input_state_lookup_win.cc',
@@ skipping 69 matching lines @@
         'test/test_aura_initializer.cc',
         'test/test_aura_initializer.h',
         'test/test_cursor_client.cc',
         'test/test_cursor_client.h',
         'test/test_event_handler.cc',
         'test/test_event_handler.h',
         'test/test_focus_client.cc',
         'test/test_focus_client.h',
         'test/test_screen.cc',
         'test/test_screen.h',
-        'test/test_stacking_client.cc',
-        'test/test_stacking_client.h',
+        'test/test_window_tree_client.cc',
+        'test/test_window_tree_client.h',
         'test/test_windows.cc',
         'test/test_windows.h',
         'test/test_window_delegate.cc',
         'test/test_window_delegate.h',
         'test/ui_controls_factory_aura.h',
         'test/ui_controls_factory_aurawin.cc',
         'test/ui_controls_factory_aurax11.cc',
         'test/window_test_api.cc',
         'test/window_test_api.h',
       ],
@@ skipping 123 matching lines @@
         ['OS=="linux" and linux_use_tcmalloc==1', {
           'dependencies': [
            # See http://crbug.com/162998#c4 for why this is needed.
             '../../base/allocator/allocator.gyp:allocator',
           ],
         }],
       ],
     },
   ],
 }