Standardize usage of virtual/override/final specifiers.

chrome/browser/autocomplete/search_provider_unittest.cc

Index: chrome/browser/autocomplete/search_provider_unittest.cc
diff --git a/chrome/browser/autocomplete/search_provider_unittest.cc b/chrome/browser/autocomplete/search_provider_unittest.cc
index 5e9317011497b379ece5f2275c040865cf92dcfe..efe348ac8b1b58e4c74c5b1d23494529362b987c 100644
--- a/chrome/browser/autocomplete/search_provider_unittest.cc
+++ b/chrome/browser/autocomplete/search_provider_unittest.cc
@@ -157,8 +157,8 @@ class SearchProviderTest : public testing::Test,
   }
 
   // See description above class for what this registers.
-  virtual void SetUp() override;
-  virtual void TearDown() override;
+  void SetUp() override;
+  void TearDown() override;
 
   void RunTest(TestData* cases, int num_cases, bool prefer_keyword);