Fix variable name in invariant comment.

Change-Id: I76f1154d8130467b04848f206f848a816e3f8c52
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2491923
Auto-Submit: Chris Fredrickson <cfredric@google.com>
Reviewed-by: Caleb Raitto <caraitto@chromium.org>
Commit-Queue: Caleb Raitto <caraitto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#819933}

chrome/browser/privacy_budget/privacy_budget_ukm_entry_filter.h

@@ -16,7 +16,7 @@
 // Doesn't affect any other kind of UKM event other than Identifiability events.
 class PrivacyBudgetUkmEntryFilter : public ukm::UkmEntryFilter {
  public:
-  // |settings| must outlive PrivacyBudgetUkmEntryFilter.
+  // |state| must outlive PrivacyBudgetUkmEntryFilter.
   explicit PrivacyBudgetUkmEntryFilter(IdentifiabilityStudyState* state);
 
   PrivacyBudgetUkmEntryFilter(const PrivacyBudgetUkmEntryFilter&) = delete;