Add CryptAuth managers to EasyUnlockServiceRegular

components/proximity_auth/cryptauth/cryptauth_enrollment_utils.h

Index: components/proximity_auth/cryptauth/cryptauth_enrollment_utils.h
diff --git a/components/proximity_auth/cryptauth/cryptauth_enrollment_utils.h b/components/proximity_auth/cryptauth/cryptauth_enrollment_utils.h
index 0bebd1a2b1123dc25cef21e7a5571627267b8795..82730a39cde3141b2dda0594c6dada9d94577bc9 100644
--- a/components/proximity_auth/cryptauth/cryptauth_enrollment_utils.h
+++ b/components/proximity_auth/cryptauth/cryptauth_enrollment_utils.h
@@ -5,6 +5,7 @@
 #ifndef COMPONENTS_PROXIMITY_AUTH_CRYPT_AUTH_ENROLLMENT_UTILS_H
 #define COMPONENTS_PROXIMITY_AUTH_CRYPT_AUTH_ENROLLMENT_UTILS_H
 
+#include <stdint.h>
 #include <string>
 
 namespace proximity_auth {
@@ -13,6 +14,10 @@ namespace proximity_auth {
 std::string CalculateDeviceUserId(const std::string& device_id,
                                   const std::string& user_id);
 
+// Hashes |string| to an int64 value. These int64 hashes are used to fill the
+// GcmDeviceInfo proto to upload to CryptAuth.
+int64_t HashStringToInt64(const std::string& string);
+
 }  // namespace proximity_auth
 
 #endif  // COMPONENTS_PROXIMITY_AUTH_CRYPT_AUTH_ENROLLMENT_UTILS_H