replace 'virtual ... OVERRIDE' with '... override'

base/test/launcher/unit_test_launcher.cc

Index: base/test/launcher/unit_test_launcher.cc
diff --git a/base/test/launcher/unit_test_launcher.cc b/base/test/launcher/unit_test_launcher.cc
index 0cbae2fac366d232ef9f7eb75a1f85eb32cef282..51dc19a4c077b6f1bd12234b358441d7f5cfa8e6 100644
--- a/base/test/launcher/unit_test_launcher.cc
+++ b/base/test/launcher/unit_test_launcher.cc
@@ -118,16 +118,16 @@ class UnitTestLauncherDelegate : public TestLauncherDelegate {
     FilePath output_file;
   };
 
-  virtual bool ShouldRunTest(const testing::TestCase* test_case,
-                             const testing::TestInfo* test_info) OVERRIDE {
+  bool ShouldRunTest(const testing::TestCase* test_case,
+                     const testing::TestInfo* test_info) override {
     DCHECK(thread_checker_.CalledOnValidThread());
 
     // There is no additional logic to disable specific tests.
     return true;
   }
 
-  virtual size_t RunTests(TestLauncher* test_launcher,
-                          const std::vector<std::string>& test_names) OVERRIDE {
+  size_t RunTests(TestLauncher* test_launcher,
+                  const std::vector<std::string>& test_names) override {
     DCHECK(thread_checker_.CalledOnValidThread());
 
     std::vector<std::string> batch;
@@ -145,9 +145,8 @@ class UnitTestLauncherDelegate : public TestLauncherDelegate {
     return test_names.size();
   }
 
-  virtual size_t RetryTests(
-      TestLauncher* test_launcher,
-      const std::vector<std::string>& test_names) OVERRIDE {
+  size_t RetryTests(TestLauncher* test_launcher,
+                    const std::vector<std::string>& test_names) override {
     MessageLoop::current()->PostTask(
         FROM_HERE,
         Bind(&UnitTestLauncherDelegate::RunSerially,