[Sync] Clean up intra-sync DEPS significantly.

components/sync/test/fake_encryptor.h

-// 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.
-
-#ifndef COMPONENTS_SYNC_TEST_FAKE_ENCRYPTOR_H_
-#define COMPONENTS_SYNC_TEST_FAKE_ENCRYPTOR_H_
-
-#include <string>
-
-#include "base/compiler_specific.h"
-#include "components/sync/base/encryptor.h"
-
-namespace syncer {
-
-// Encryptor which simply base64-encodes the plaintext to get the
-// ciphertext.  Obviously, this should be used only for testing.
-class FakeEncryptor : public Encryptor {
- public:
-  ~FakeEncryptor() override;
-
-  bool EncryptString(const std::string& plaintext,
-                     std::string* ciphertext) override;
-
-  bool DecryptString(const std::string& ciphertext,
-                     std::string* plaintext) override;
-};
-
-}  // namespace syncer
-
-#endif  // COMPONENTS_SYNC_TEST_FAKE_ENCRYPTOR_H_