Update {virtual,override,final} to follow C++11 style.

chrome/browser/history/android/android_cache_database_unittest.cc

Index: chrome/browser/history/android/android_cache_database_unittest.cc
diff --git a/chrome/browser/history/android/android_cache_database_unittest.cc b/chrome/browser/history/android/android_cache_database_unittest.cc
index d67c997a7e9b6d6c0c98cb89b67f232119bf2433..8d51ffa8b9f25dc48b23189b730b6145aca264cc 100644
--- a/chrome/browser/history/android/android_cache_database_unittest.cc
+++ b/chrome/browser/history/android/android_cache_database_unittest.cc
@@ -21,10 +21,10 @@ namespace history {
 class AndroidCacheDatabaseTest : public testing::Test {
  public:
   AndroidCacheDatabaseTest() {}
-  virtual ~AndroidCacheDatabaseTest() {}
+  ~AndroidCacheDatabaseTest() override {}
 
  protected:
-  virtual void SetUp() {
+  void SetUp() override {
     // Get a temporary directory for the test DB files.
     ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
     base::FilePath history_db_name_ =