Remove auto raw pointer deduction from non-linux specific code.

device/gamepad/xbox_data_fetcher_mac.mm

Index: device/gamepad/xbox_data_fetcher_mac.mm
diff --git a/device/gamepad/xbox_data_fetcher_mac.mm b/device/gamepad/xbox_data_fetcher_mac.mm
index 0615de5686ee603f472416d3fd52807ddca47262..a6980740d3c28a2b94cab65d18fe45dcb69b86d7 100644
--- a/device/gamepad/xbox_data_fetcher_mac.mm
+++ b/device/gamepad/xbox_data_fetcher_mac.mm
@@ -624,7 +624,7 @@ GamepadSource XboxDataFetcher::source() {
 void XboxDataFetcher::GetGamepadData(bool devices_changed_hint) {
   // This just loops through all the connected pads and "pings" them to indicate
   // that they're still active.
-  for (const auto& controller : controllers_) {
+  for (auto* controller : controllers_) {
     GetPadState(controller->location_id());
   }
 }