[EasyUnlock] Move DataWithTimestamp out of ForegroundEidGenerator so it can be shared.

components/cryptauth/raw_eid_generator.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_BLE_RAW_EID_GENERATOR_H_
 #define COMPONENTS_CRYPTAUTH_BLE_RAW_EID_GENERATOR_H_
 
 #include <string>
+#include <vector>
+
+#include "components/cryptauth/eid_data_with_timestamp.h"
 
 namespace cryptauth {
 
 // Generates raw ephemeral ID (EID) values that are used by the
 // ForegroundEidGenerator and BackgroundEidGenerator classes.
 class RawEidGenerator {
  public:
   virtual ~RawEidGenerator() {}
 
   // The size of an EID in bytes.
   static const int32_t kNumBytesInEidValue;
 
+  // Converts a eid to a user-readable debug string.
+  static std::string EidToDebugString(const std::string& eid);

[Kyle Horimoto, 2017/04/28 22:19:16]

I think you forgot to upload the .cc file (or you just forgot to implement this
function).

[Tim Song, 2017/04/29 01:07:50]

Sorry, I didn't mean for this file to be in the CL.

+
   // Generates the EID at |start_of_period_timestamp_ms| using the given
   // |eid_seed|. If |extra_entropy| is not null, then it will be used in the EID
   // calculation.
   virtual std::string GenerateEid(const std::string& eid_seed,
                                   int64_t start_of_period_timestamp_ms,
                                   std::string const* extra_entropy) = 0;
 };
 
 }  // cryptauth
 
 #endif  // COMPONENTS_CRYPTAUTH_BLE_RAW_EID_GENERATOR_H_