SelectionOwner: add support for TIMESTAMP target

ui/base/ui_base.gyp

 # Copyright 2014 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 437 matching lines @@
             'cursor/cursor_loader_x11.cc',
             'cursor/cursor_loader_x11.h',
             'cursor/cursor_win.cc',
             'cursor/cursor_x11.cc',
             'x/selection_owner.cc',
             'x/selection_owner.h',
             'x/selection_requestor.cc',
             'x/selection_requestor.h',
             'x/selection_utils.cc',
             'x/selection_utils.h',
-          ]
+          ],
         }],
         ['use_aura==0 or OS!="linux"', {
           'sources!': [
             'resource/resource_bundle_auralinux.cc',
           ],
         }],
         ['use_ozone==1', {
           'dependencies': [
             '../events/devices/events_devices.gyp:events_devices',
             '../events/ozone/events_ozone.gyp:events_ozone_evdev',
@@ skipping 309 matching lines @@
            ],
            'variables': {
              'jni_gen_package': 'ui',
            },
            'includes': [ '../../build/jni_generator.gypi' ],
          },
        ],
     }],
   ],
 }