Cleanup: Remove ViewProp from aura build

ui/ui_unittests.gypi

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'ui_test_support',
       'dependencies': [
         '../base/base.gyp:base',
@@ skipping 143 matching lines @@
             '../build/linux/system.gyp:gtk',
           ],
         }],
         ['toolkit_views==1', {
           'sources': [
             'gfx/render_text_unittest.cc',
           ],
         }],
         ['use_aura==1', {
           'sources!': [
+            'base/view_prop_unittest.cc',
             'gfx/screen_unittest.cc',
           ],
         }],
       ],
     },
   ],
 }