| Index: base/unguessable_token.h
 | 
| diff --git a/base/unguessable_token.h b/base/unguessable_token.h
 | 
| index b1b3870723340d3dae94bee4f7e98b82efd1c3a3..9f38783a3ca8c482f7072c909f249f0cc752609d 100644
 | 
| --- a/base/unguessable_token.h
 | 
| +++ b/base/unguessable_token.h
 | 
| @@ -45,7 +45,7 @@ class BASE_EXPORT UnguessableToken {
 | 
|  
 | 
|    // Creates an empty UnguessableToken.
 | 
|    // Assign to it with Create() before using it.
 | 
| -  UnguessableToken() = default;
 | 
| +  constexpr UnguessableToken() = default;
 | 
|  
 | 
|    // NOTE: Serializing an empty UnguessableToken is an illegal operation.
 | 
|    uint64_t GetHighForSerialization() const {
 | 
| 
 |