Add more control over sync for Chromium testshell.

chrome/chrome_tests.gypi

 # Copyright 2013 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' : {
     'pyautolib_sources': [
       'app/chrome_command_ids.h',
       'app/chrome_dll_resource.h',
       'common/automation_constants.h',
       'common/pref_names.cc',
@@ skipping 3343 matching lines @@
         {
           'target_name': 'chrome_java_test_support',
           'type': 'none',
           'variables': {
             'package_name': 'chrome_java_test_support',
             'java_in_dir': '../chrome/test/android/javatests',
           },
           'dependencies': [
             'chrome_java',
             '../content/content.gyp:content_java_test_support',
+            '../sync/sync.gyp:sync_java',
+            '../sync/sync.gyp:sync_java_test_support',
           ],
           'includes': [ '../build/java.gypi' ],
         },
       ],
     }],
     ['test_isolation_mode != "noop"', {
       'targets': [
         {
           'target_name': 'browser_tests_run',
           'type': 'none',
@@ skipping 99 matching lines @@
             'utility',
           ],
           'sources': [
             'tools/service_discovery_sniffer/service_discovery_sniffer.h',
             'tools/service_discovery_sniffer/service_discovery_sniffer.cc',
           ],
         }]
     }],
   ],  # 'conditions'
 }