[Sync] Update DirectoryBackingStore to detect Sync DB corruption

sync/sync_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.
 
 {
   'targets': [
     # Test support files for the 'sync_core' target.
     # GN version: //sync:test_support_sync_core
     {
       'target_name': 'test_support_sync_core',
@@ skipping 231 matching lines @@
         'SYNC_TEST',
       ],
       'dependencies': [
         '../base/base.gyp:base',
         '../base/base.gyp:run_all_unittests',
         '../google_apis/google_apis.gyp:google_apis',
         '../google_apis/google_apis.gyp:google_apis_test_support',
         '../net/net.gyp:net',
         '../net/net.gyp:net_test_support',
         '../sql/sql.gyp:sql',
+        '../sql/sql.gyp:test_support_sql',

[Nicolas Zea, 2015/04/13 20:16:33]

strange, does sql have the target named two different ways in gyp vs gn
(test_support vs test_support_sql)?

[maniscalco, 2015/04/14 17:44:14]

Yes, two different names.  I believe the name used in gn is the more standard
naming scheme.

[Scott Hess - ex-Googler, 2015/04/14 19:51:01]

gyp seems to always say "namespace_test_supprt" or "test_support_namespace" and
I'm sure there's a "test_namespace_support".  Dunno why, I just copied the model
I found which seemed most similar to whatever I was attempting at the time.  I
suspect all of this is why GN doesn't namespace the namespace every other
namespace.

         '../testing/gmock.gyp:gmock',
         '../testing/gtest.gyp:gtest',
         '../third_party/leveldatabase/leveldatabase.gyp:leveldatabase',
         '../third_party/protobuf/protobuf.gyp:protobuf_lite',
         'sync',
         'test_support_sync_core',
         'test_support_sync_internal_api',
       ],
       'include_dirs': [
         '..',
@@ skipping 272 matching lines @@
           ],
           'variables': {
             'test_suite_name': 'sync_unit_tests',
           },
           'includes': [ '../build/apk_test.gypi' ],
         },
       ],
     }],
   ],
 }