Standardize usage of virtual/override/final specifiers.

chrome/utility/image_writer/image_writer_unittest.cc

Index: chrome/utility/image_writer/image_writer_unittest.cc
diff --git a/chrome/utility/image_writer/image_writer_unittest.cc b/chrome/utility/image_writer/image_writer_unittest.cc
index 69439e9c654ca2f4d36a2aa08bbd401ce978a9a4..8757f0d552ce84e563ef27da5686b24b91be72ea 100644
--- a/chrome/utility/image_writer/image_writer_unittest.cc
+++ b/chrome/utility/image_writer/image_writer_unittest.cc
@@ -27,14 +27,14 @@ const int kTestPattern = 0x55555555;
 
 class ImageWriterUtilityTest : public testing::Test {
  protected:
-  virtual void SetUp() override {
+  void SetUp() override {
     ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
     ASSERT_TRUE(base::CreateTemporaryFileInDir(temp_dir_.path(), &image_path_));
     ASSERT_TRUE(
         base::CreateTemporaryFileInDir(temp_dir_.path(), &device_path_));
   }
 
-  virtual void TearDown() override {}
+  void TearDown() override {}
 
   void FillFile(const base::FilePath& path, int pattern) {
     scoped_ptr<char[]> buffer(new char[kTestFileSize]);