Include sync.pb.h in sync_data.h.

chrome/chrome_tests_unit.gypi

 # Copyright 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.
 {
   'targets': [
     {
       # This target contains mocks and test utilities that don't belong in
       # production libraries but are used by more than one test executable.
       'target_name': 'test_support_common',
       'type': 'static_library',
@@ skipping 16 matching lines @@
         '../skia/skia.gyp:skia',
         '../sql/sql.gyp:sql',
         '../sql/sql.gyp:test_support_sql',
         '../sync/sync.gyp:sync',
         '../testing/gmock.gyp:gmock',
         '../testing/gtest.gyp:gtest',
         '../third_party/zlib/zlib.gyp:zlib',
         '../ui/message_center/message_center.gyp:message_center_test_support',
       ],
       'export_dependent_settings': [
+        'browser',
         '../base/base.gyp:test_support_base',
         '../content/content_shell_and_tests.gyp:test_support_content',
       ],
       'include_dirs': [
         '..',
       ],
       'sources': [
         'app/chrome_main_delegate.cc',
         'app/chrome_main_delegate.h',
         'browser/android/bookmarks/partner_bookmarks_shim_unittest.cc',
@@ skipping 2852 matching lines @@
             'browser/ui/app_list/test/fake_profile_store.h',
             'browser/ui/app_list/test/fast_show_pickler_unittest.cc',
             'browser/ui/views/app_list/linux/app_list_linux_unittest.cc',
             'browser/ui/views/app_list/win/app_list_win_unittest.cc',
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }