The archetype "Eldrazi Tron" is not found in the database. After reviewing known Modern archetypes, there is no exact match for this name. It's possible this refers to a deck combining Eldrazi elements with Urzatron, but such a hybrid is not currently recognized in the meta. Classic "Eldrazi" decks in Modern typically center on colorless Eldrazi pilots with Chalice of the Void and Reality Smasher, while "Tron" decks focus on assembling the Urza lands to play large finishers like Ulamog, the Ceaseless Hunger.
Given the lack of a clear archetype match, I cannot calculate a winrate.
I don't have sufficient tournament data to answer this question.