Use 'override/final' instead of 'virtual' for overridden methods

The patch is generated using clang-tidy misc-use-override check.

This command was used:

  tools/clang/tools/extra/clang-tidy/tool/run-clang-tidy.py \
    -checks='-*,misc-use-override' -header-filter='llvm|clang' \
    -j=32 -fix -format

http://reviews.llvm.org/D8925

llvm-svn: 234679
diff --git a/llvm/utils/unittest/googletest/include/gtest/gtest.h b/llvm/utils/unittest/googletest/include/gtest/gtest.h
index 257cee6..92ca5cc 100644
--- a/llvm/utils/unittest/googletest/include/gtest/gtest.h
+++ b/llvm/utils/unittest/googletest/include/gtest/gtest.h
@@ -982,21 +982,22 @@
 class EmptyTestEventListener : public TestEventListener {
   virtual void anchor();
  public:
-  virtual void OnTestProgramStart(const UnitTest& /*unit_test*/) {}
-  virtual void OnTestIterationStart(const UnitTest& /*unit_test*/,
-                                    int /*iteration*/) {}
-  virtual void OnEnvironmentsSetUpStart(const UnitTest& /*unit_test*/) {}
-  virtual void OnEnvironmentsSetUpEnd(const UnitTest& /*unit_test*/) {}
-  virtual void OnTestCaseStart(const TestCase& /*test_case*/) {}
-  virtual void OnTestStart(const TestInfo& /*test_info*/) {}
-  virtual void OnTestPartResult(const TestPartResult& /*test_part_result*/) {}
-  virtual void OnTestEnd(const TestInfo& /*test_info*/) {}
-  virtual void OnTestCaseEnd(const TestCase& /*test_case*/) {}
-  virtual void OnEnvironmentsTearDownStart(const UnitTest& /*unit_test*/) {}
-  virtual void OnEnvironmentsTearDownEnd(const UnitTest& /*unit_test*/) {}
-  virtual void OnTestIterationEnd(const UnitTest& /*unit_test*/,
-                                  int /*iteration*/) {}
-  virtual void OnTestProgramEnd(const UnitTest& /*unit_test*/) {}
+   void OnTestProgramStart(const UnitTest & /*unit_test*/) override {}
+   void OnTestIterationStart(const UnitTest & /*unit_test*/,
+                             int /*iteration*/) override {}
+   void OnEnvironmentsSetUpStart(const UnitTest & /*unit_test*/) override {}
+   void OnEnvironmentsSetUpEnd(const UnitTest & /*unit_test*/) override {}
+   void OnTestCaseStart(const TestCase & /*test_case*/) override {}
+   void OnTestStart(const TestInfo & /*test_info*/) override {}
+   void OnTestPartResult(const TestPartResult & /*test_part_result*/) override {
+   }
+   void OnTestEnd(const TestInfo & /*test_info*/) override {}
+   void OnTestCaseEnd(const TestCase & /*test_case*/) override {}
+   void OnEnvironmentsTearDownStart(const UnitTest & /*unit_test*/) override {}
+   void OnEnvironmentsTearDownEnd(const UnitTest & /*unit_test*/) override {}
+   void OnTestIterationEnd(const UnitTest & /*unit_test*/,
+                           int /*iteration*/) override {}
+   void OnTestProgramEnd(const UnitTest & /*unit_test*/) override {}
 };
 
 // TestEventListeners lets users add listeners to track events in Google Test.