WIP: change over background executor test helpers

crates/gpui2/src/executor.rs

@@ -222,11 +222,6 @@ impl BackgroundExecutor {
         self.dispatcher.as_test().unwrap().allow_parking();
     }
 
-    #[cfg(any(test, feature = "test-support"))]
-    pub fn record_backtrace(&self) {
-        self.dispatcher.as_test().unwrap().record_backtrace();
-    }
-
     #[cfg(any(test, feature = "test-support"))]
     pub fn rng(&self) -> StdRng {
         self.dispatcher.as_test().unwrap().rng()

crates/gpui2/src/platform/test/dispatcher.rs

@@ -128,12 +128,8 @@ impl TestDispatcher {
         })
     }
 
-    pub fn record_backtrace(&self) {
-        todo!("record_backtrace")
-    }
-
     pub fn rng(&self) -> StdRng {
-        todo!("rng")
+        self.state.lock().random.clone()
     }
 }