Standardize usage of virtual/override/final in chrome/browser/

chrome/browser/diagnostics/diagnostics_test.h

Index: chrome/browser/diagnostics/diagnostics_test.h
diff --git a/chrome/browser/diagnostics/diagnostics_test.h b/chrome/browser/diagnostics/diagnostics_test.h
index 3769f6decfbd0bacca0cb258825035548eb978ee..d2e51449fda9d97040a1b4b2ebeba8996cfae7ce 100644
--- a/chrome/browser/diagnostics/diagnostics_test.h
+++ b/chrome/browser/diagnostics/diagnostics_test.h
@@ -29,7 +29,7 @@ class DiagnosticsTest : public DiagnosticsModel::TestInfo {
  public:
   explicit DiagnosticsTest(DiagnosticsTestId id);
 
-  virtual ~DiagnosticsTest();
+  ~DiagnosticsTest() override;
 
   // Runs the test. Returning false signals that no more tests should be run.
   // The actual outcome of the test should be set using the RecordXX functions.
@@ -62,14 +62,15 @@ class DiagnosticsTest : public DiagnosticsModel::TestInfo {
   static base::FilePath GetUserDefaultProfileDir();
 
   // DiagnosticsModel::TestInfo overrides
-  virtual int GetId() const override;
-  virtual std::string GetName() const override;
-  virtual std::string GetTitle() const override;
-  virtual DiagnosticsModel::TestResult GetResult() const override;
-  virtual std::string GetAdditionalInfo() const override;
-  virtual int GetOutcomeCode() const override;
-  virtual base::Time GetStartTime() const override;
-  virtual base::Time GetEndTime() const override;
+  int GetId() const override;
+  std::string GetName() const override;
+  std::string GetTitle() const override;
+  DiagnosticsModel::TestResult GetResult() const override;
+  std::string GetAdditionalInfo() const override;
+  int GetOutcomeCode() const override;
+  base::Time GetStartTime() const override;
+  base::Time GetEndTime() const override;
+
  protected:
   // Derived classes override this method do perform the actual test.
   virtual bool ExecuteImpl(DiagnosticsModel::Observer* observer) = 0;