Convert Autofill Uses of base::RepeatingCallback<>::Equals to Use == or !=

BUG=937566

Change-Id: I43e91f3b8b35cb44e9463f417522fdb28cee0ba2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1642241
Auto-Submit: Robert Liao <robliao@chromium.org>
Reviewed-by: Roger McFarlane <rogerm@chromium.org>
Commit-Queue: Robert Liao <robliao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#666323}

components/autofill/content/browser/key_press_handler_manager.cc

@@ -17,7 +17,7 @@ void KeyPressHandlerManager::RegisterKeyPressHandler(
   // same function with the same bound arguments. That's not what Equals() does
   // (they have to have the same BindState), but it's the closest approximation
   // available.
-  if (handler.is_null() || handler.Equals(handler_))
+  if (handler.is_null() || (handler == handler_))
     return;
 
   if (!handler_.is_null())