[CrOS Tether] ProximityAuth WebUI improvement: show the local device's ID.

components/proximity_auth/proximity_auth_client.h

 // Copyright 2015 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_PROXIMITY_AUTH_PROXIMITY_AUTH_CLIENT_H_
 #define COMPONENTS_PROXIMITY_AUTH_PROXIMITY_AUTH_CLIENT_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 61 matching lines @@
   // API requests.
   virtual cryptauth::DeviceClassifier GetDeviceClassifier() = 0;
 
   // Returns the account id of the user.
   virtual std::string GetAccountId() = 0;
 
   virtual cryptauth::CryptAuthEnrollmentManager*
   GetCryptAuthEnrollmentManager() = 0;
 
   virtual cryptauth::CryptAuthDeviceManager* GetCryptAuthDeviceManager() = 0;
+
+  virtual std::string GetLocalDevicePublicKey() = 0;
 };
 
 }  // namespace proximity_auth
 
 #endif  // COMPONENTS_PROXIMITY_AUTH_PROXIMITY_AUTH_CLIENT_H_