[Sync] Handle errors during first sync gracefully.

chrome/browser/sync/glue/sync_backend_host_unittest.cc

 // 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.
 
 #include "chrome/browser/sync/glue/sync_backend_host.h"
 
 #include <cstddef>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
@@ skipping 32 matching lines @@
                void(sync_api::PassphraseRequiredReason,
                     const sync_pb::EncryptedData&));
   MOCK_METHOD0(OnPassphraseAccepted, void());
   MOCK_METHOD2(OnEncryptedTypesChanged,
                void(syncable::ModelTypeSet, bool));
   MOCK_METHOD0(OnEncryptionComplete, void());
   MOCK_METHOD1(OnMigrationNeededForTypes, void(syncable::ModelTypeSet));
   MOCK_METHOD1(OnDataTypesChanged, void(syncable::ModelTypeSet));
   MOCK_METHOD1(OnActionableError,
       void(const browser_sync::SyncProtocolError& sync_error));
+  MOCK_METHOD0(OnSyncConfigureRetry, void());
 };
 
 }  // namespace
 
 class SyncBackendHostTest : public testing::Test {
  protected:
   SyncBackendHostTest()
       : ui_thread_(BrowserThread::UI, &ui_loop_),
         io_thread_(BrowserThread::IO) {}
 
@@ skipping 43 matching lines @@
                      credentials,
                      true,
                      &handler_mock);
   backend.StopSyncingForShutdown();
   backend.Shutdown(false);
 }
 
 // TODO(akalin): Write more SyncBackendHost unit tests.
 
 }  // namespace browser_sync