Standardize usage of virtual/override/final specifiers.

chrome/browser/safe_browsing/safe_browsing_database_unittest.cc

Index: chrome/browser/safe_browsing/safe_browsing_database_unittest.cc
diff --git a/chrome/browser/safe_browsing/safe_browsing_database_unittest.cc b/chrome/browser/safe_browsing/safe_browsing_database_unittest.cc
index 44d9bdbbf85421d9c17a1008ae9dff9373a6f800..5631bfe18085f21cbd287def986357add8e2b540 100644
--- a/chrome/browser/safe_browsing/safe_browsing_database_unittest.cc
+++ b/chrome/browser/safe_browsing/safe_browsing_database_unittest.cc
@@ -254,7 +254,7 @@ class ScopedLogMessageIgnorer {
 
 class SafeBrowsingDatabaseTest : public PlatformTest {
  public:
-  virtual void SetUp() {
+  void SetUp() override {
     PlatformTest::SetUp();
 
     // Setup a database in a temporary directory.
@@ -265,7 +265,7 @@ class SafeBrowsingDatabaseTest : public PlatformTest {
     database_->Init(database_filename_);
   }
 
-  virtual void TearDown() {
+  void TearDown() override {
     database_.reset();
 
     PlatformTest::TearDown();