Standardize usage of virtual/override/final specifiers.

components/policy/core/common/async_policy_provider_unittest.cc

Index: components/policy/core/common/async_policy_provider_unittest.cc
diff --git a/components/policy/core/common/async_policy_provider_unittest.cc b/components/policy/core/common/async_policy_provider_unittest.cc
index 2768de75516de69f029a543e07560d2b9d256796..6219346ab370c93993c49a076f36ffbdef8de369 100644
--- a/components/policy/core/common/async_policy_provider_unittest.cc
+++ b/components/policy/core/common/async_policy_provider_unittest.cc
@@ -78,10 +78,10 @@ scoped_ptr<PolicyBundle> MockPolicyLoader::Load() {
 class AsyncPolicyProviderTest : public testing::Test {
  protected:
   AsyncPolicyProviderTest();
-  virtual ~AsyncPolicyProviderTest();
+  ~AsyncPolicyProviderTest() override;
 
-  virtual void SetUp() override;
-  virtual void TearDown() override;
+  void SetUp() override;
+  void TearDown() override;
 
   base::MessageLoop loop_;
   SchemaRegistry schema_registry_;