Standardize usage of virtual/override/final specifiers.

chrome/test/base/chrome_render_view_host_test_harness.h

Index: chrome/test/base/chrome_render_view_host_test_harness.h
diff --git a/chrome/test/base/chrome_render_view_host_test_harness.h b/chrome/test/base/chrome_render_view_host_test_harness.h
index 7df7bd338c0daca85cb90e318af02ae5287a2fc8..ebba6c7930fb1b3bed06765df2166d04bb731e7b 100644
--- a/chrome/test/base/chrome_render_view_host_test_harness.h
+++ b/chrome/test/base/chrome_render_view_host_test_harness.h
@@ -20,13 +20,13 @@ class ChromeRenderViewHostTestHarness
     : public content::RenderViewHostTestHarness {
  public:
   ChromeRenderViewHostTestHarness();
-  virtual ~ChromeRenderViewHostTestHarness();
+  ~ChromeRenderViewHostTestHarness() override;
 
   TestingProfile* profile();
 
  protected:
   // testing::Test
-  virtual void TearDown() override;
+  void TearDown() override;
 
   // content::RenderViewHostTestHarness.
   content::BrowserContext* CreateBrowserContext() override;