[CrOS Tether] Add FakeCryptAuthService, a test double for CryptAuthService.

components/cryptauth/cryptauth_service.h

 // Copyright 2017 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_CRYPTAUTH_CRYPTAUTH_SERVICE_H_
 #define COMPONENTS_CRYPTAUTH_CRYPTAUTH_SERVICE_H_
 
+#include <memory>

[Ryan Hansberry, 2017/04/06 15:18:25]

Is this necessary?

[Kyle Horimoto, 2017/04/06 16:51:34]

For some reason, it wasn't compiling without this. Not sure why it didn't happen
before. But, it seems to make sense, since I'm using a std::unique_ptr.

+
 #include "base/macros.h"
 #include "components/cryptauth/proto/cryptauth_api.pb.h"
 
 namespace cryptauth {
 
 class CryptAuthClientFactory;
 class CryptAuthDeviceManager;
 class CryptAuthEnrollmentManager;
 class SecureMessageDelegate;
 
@@ skipping 13 matching lines @@
   CryptAuthService() {}
   virtual ~CryptAuthService() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(CryptAuthService);
 };
 
 }  // namespace cryptauth
 
 #endif  // COMPONENTS_CRYPTAUTH_CRYPTAUTH_SERVICE_H_