aura: Do not include test code in production code.

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 142 matching lines @@
         'test/test_event_handler.cc',
         'test/test_event_handler.h',
         'test/test_screen.cc',
         'test/test_screen.h',
         'test/test_stacking_client.cc',
         'test/test_stacking_client.h',
         'test/test_windows.cc',
         'test/test_windows.h',
         'test/test_window_delegate.cc',
         'test/test_window_delegate.h',
+        'test/window_test_api.cc',
+        'test/window_test_api.h',
       ],
     },
     {
       # We build a minimal set of resources required for aura_test_support.
       'target_name': 'aura_test_support_pak',
       'type': 'none',
       'dependencies': [
         '<(DEPTH)/ui/ui.gyp:ui_resources',
       ],
       'variables': {
@@ skipping 98 matching lines @@
         # osmesa GL implementation is used on linux.
         ['OS=="linux"', {
           'dependencies': [
             '<(DEPTH)/third_party/mesa/mesa.gyp:osmesa',
           ],
         }],
       ],
     },
   ],
 }