Revert of Convert compositor_unittests to run exclusively on Swarming

ui/compositor/compositor.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 177 matching lines @@
             ['use_allocator!="none"', {
               'dependencies': [
                 '<(DEPTH)/base/allocator/allocator.gyp:allocator',
               ],
             }],
           ],
         }],
       ],
     },
   ],
-  'conditions': [
-    ['test_isolation_mode != "noop"', {
-      'targets': [
-        {
-          'target_name': 'compositor_unittests_run',
-          'type': 'none',
-          'dependencies': [
-            'compositor_unittests',
-          ],
-          'includes': [ '../../build/isolate.gypi' ],
-          'sources': [ 'compositor_unittests.isolate' ],
-        },
-      ],
-    }],
-  ],
 }