Add suppress_wildcard to sync_tests pseudo-target

sync/sync.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': [
     # The core sync library.
@@ skipping 228 matching lines @@
       ],
     },
 
     # Unit tests for the 'sync' target.  This cannot be a static
     # library because the unit test files have to be compiled directly
     # into the executable, so we push the target files to the
     # depending executable target via direct_dependent_settings.
     {
       'target_name': 'sync_tests',
       'type': 'none',
+      # We only want unit test executables to include this target.
+      'suppress_wildcard': 1,
       'dependencies': [
         '../base/base.gyp:base',
         '../base/base.gyp:test_support_base',
         '../testing/gmock.gyp:gmock',
         '../testing/gtest.gyp:gtest',
         'sync',
         'test_support_sync',
       ],
       'export_dependent_settings': [
         '../base/base.gyp:base',
@@ skipping 83 matching lines @@
       'conditions': [
         ['OS=="linux" and linux_use_tcmalloc==1', {
           'dependencies': [
             '../base/allocator/allocator.gyp:allocator',
           ],
         }],
       ],
     },
   ],
 }