[Sync] Update DirectoryBackingStore to detect Sync DB corruption

sync/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/features.gni")
 import("//testing/test.gni")
 
 component("sync") {
   public_deps = [
     ":sync_core",
@@ skipping 625 matching lines @@
     ":test_support_sync_core",
     ":test_support_sync_internal_api",
     "//base",
     "//base/allocator",
     "//base/test:run_all_unittests",
     "//google_apis",
     "//google_apis:test_support",
     "//net",
     "//net:test_support",
     "//sql",
+    "//sql:test_support",
     "//sync",
     "//sync/internal_api/attachments/proto",
     "//sync/protocol",
     "//testing/gmock",
     "//testing/gtest",
     "//third_party/leveldatabase",
     "//third_party/protobuf:protobuf_lite",
   ]
 
   if (is_chromeos) {
@@ skipping 158 matching lines @@
     deps = [
       ":fake_server_jni",
       ":sync_core",
       ":test_support_sync_fake_server",
       "//base",
       "//sync/protocol:protocol",
       "//testing/gtest",
     ]
   }
 }