[EasyUnlock] Serialize and store BeaconSeeds along as cryptohome key metadata.

chrome/browser/chromeos/login/easy_unlock/easy_unlock_get_keys_operation.cc

 // Copyright 2014 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/chromeos/login/easy_unlock/easy_unlock_get_keys_operation.h"
 
 #include <stdint.h>
 
 #include <vector>
 
@@ skipping 107 matching lines @@
     } else if (entry.name == kEasyUnlockKeyMetaNameChallenge) {
       if (entry.bytes)
         device.challenge = *entry.bytes;
       else
         NOTREACHED();
     } else if (entry.name == kEasyUnlockKeyMetaNameWrappedSecret) {
       if (entry.bytes)
         device.wrapped_secret = *entry.bytes;
       else
         NOTREACHED();
+    } else if (entry.name == kEasyUnlockKeyMetaNameSerializedBeaconSeeds) {
+      if (entry.bytes)
+        device.serialized_beacon_seeds = *entry.bytes;
+      else
+        NOTREACHED();
     } else {
-      PA_LOG(WARNING) << "Unknown Easy unlock key data entry, name="
+      PA_LOG(WARNING) << "Unknown EasyUnlock key data entry, name="
                       << entry.name;
     }
   }
   devices_.push_back(device);
 
   ++key_index_;
   GetKeyData();
 }
 
 }  // namespace chromeos