Standardize usage of virtual/override/final specifiers.

chrome/browser/safe_browsing/browser_feature_extractor_unittest.cc

Index: chrome/browser/safe_browsing/browser_feature_extractor_unittest.cc
diff --git a/chrome/browser/safe_browsing/browser_feature_extractor_unittest.cc b/chrome/browser/safe_browsing/browser_feature_extractor_unittest.cc
index 793dda3775809db3e6075891522c644bb7489070..98492331db59cc9b315ed09a3c9c1ce5f989b84b 100644
--- a/chrome/browser/safe_browsing/browser_feature_extractor_unittest.cc
+++ b/chrome/browser/safe_browsing/browser_feature_extractor_unittest.cc
@@ -78,7 +78,7 @@ class MockClientSideDetectionHost : public ClientSideDetectionHost {
 
 class BrowserFeatureExtractorTest : public ChromeRenderViewHostTestHarness {
  protected:
-  virtual void SetUp() {
+  void SetUp() override {
     ChromeRenderViewHostTestHarness::SetUp();
     ASSERT_TRUE(profile()->CreateHistoryService(
         true /* delete_file */, false /* no_db */));
@@ -93,7 +93,7 @@ class BrowserFeatureExtractorTest : public ChromeRenderViewHostTestHarness {
     browse_info_.reset(new BrowseInfo);
   }
 
-  virtual void TearDown() {
+  void TearDown() override {
     extractor_.reset();
     host_.reset();
     db_manager_ = NULL;