Standardize usage of virtual/override/final specifiers.

components/omnibox/base_search_provider_unittest.cc

Index: components/omnibox/base_search_provider_unittest.cc
diff --git a/components/omnibox/base_search_provider_unittest.cc b/components/omnibox/base_search_provider_unittest.cc
index 42a9f1819719fce646e8bb54c0a9ca22e6b1dbbb..dc0782775100b3dee32df3c22dd9daed4bcb7f25 100644
--- a/components/omnibox/base_search_provider_unittest.cc
+++ b/components/omnibox/base_search_provider_unittest.cc
@@ -93,10 +93,10 @@ class TestBaseSearchProvider : public BaseSearchProvider {
 
 class BaseSearchProviderTest : public testing::Test {
  public:
-  virtual ~BaseSearchProviderTest() {}
+  ~BaseSearchProviderTest() override {}
 
  protected:
-  virtual void SetUp() {
+  void SetUp() override {
     service_.reset(
         new TemplateURLService(NULL,
                                scoped_ptr<SearchTermsData>(new SearchTermsData),