Forward delcares for `base/values.h` had been abandoned as `base::Value::Dict/List` were nested types that could not be fowared-declared. This change corrects several places where the inclusion of `base/values.h` can be avoideded.
Forward delcares for `base/values.h` had been abandoned as `base::Value::Dict/List` were nested types that could not be fowared-declared. This change corrects several places where the inclusion of `base/values.h` can be avoideded.