Split ValueSerializer into separate Serializer and Deserializer classes.

sync/internal_api/sync_encryption_handler_impl.cc

Index: sync/internal_api/sync_encryption_handler_impl.cc
diff --git a/sync/internal_api/sync_encryption_handler_impl.cc b/sync/internal_api/sync_encryption_handler_impl.cc
index 709b38dde0e8c3dc8073c51b53701337a7e4bad0..4bf559fd8580c958fe0caa8d18ddfa01ceb933a5 100644
--- a/sync/internal_api/sync_encryption_handler_impl.cc
+++ b/sync/internal_api/sync_encryption_handler_impl.cc
@@ -174,7 +174,8 @@ bool UnpackKeystoreBootstrapToken(
                                 &decrypted_keystore_bootstrap)) {
     return false;
   }
-  JSONStringValueSerializer json(&decrypted_keystore_bootstrap);
+
+  JSONStringValueDeserializer json(decrypted_keystore_bootstrap);
   scoped_ptr<base::Value> deserialized_keystore_keys(
       json.Deserialize(NULL, NULL));
   if (!deserialized_keystore_keys)