Standardize usage of virtual/override/final in components/

components/invalidation/invalidator_test_template.h

Index: components/invalidation/invalidator_test_template.h
diff --git a/components/invalidation/invalidator_test_template.h b/components/invalidation/invalidator_test_template.h
index 277d8b3c592347f967aefe60accbd37de1eb9121..f6a8cef6e04a4106945c38c1c53701251f3dca0c 100644
--- a/components/invalidation/invalidator_test_template.h
+++ b/components/invalidation/invalidator_test_template.h
@@ -332,7 +332,7 @@ namespace internal {
 class BoundFakeInvalidationHandler : public FakeInvalidationHandler {
  public:
   explicit BoundFakeInvalidationHandler(const Invalidator& invalidator);
-  virtual ~BoundFakeInvalidationHandler();
+  ~BoundFakeInvalidationHandler() override;
 
   // Returns the last return value of GetInvalidatorState() on the
   // bound invalidator from the last time the invalidator state
@@ -340,7 +340,7 @@ class BoundFakeInvalidationHandler : public FakeInvalidationHandler {
   InvalidatorState GetLastRetrievedState() const;
 
   // InvalidationHandler implementation.
-  virtual void OnInvalidatorStateChange(InvalidatorState state) override;
+  void OnInvalidatorStateChange(InvalidatorState state) override;
 
  private:
   const Invalidator& invalidator_;