Standardize usage of virtual/override/final specifiers.

components/component_updater/test/component_patcher_unittest.h

Index: components/component_updater/test/component_patcher_unittest.h
diff --git a/components/component_updater/test/component_patcher_unittest.h b/components/component_updater/test/component_patcher_unittest.h
index 992e0f82fa88164161b8ac6d0b4e360bc0710313..3eb1b97369c387a6f3f65d3990e04dc70664748b 100644
--- a/components/component_updater/test/component_patcher_unittest.h
+++ b/components/component_updater/test/component_patcher_unittest.h
@@ -24,7 +24,7 @@ const char binary_output_hash[] =
 class ComponentPatcherOperationTest : public testing::Test {
  public:
   explicit ComponentPatcherOperationTest();
-  virtual ~ComponentPatcherOperationTest();
+  ~ComponentPatcherOperationTest() override;
 
  protected:
   base::ScopedTempDir input_dir_;