Standardize usage of virtual/override/final in content/

content/test/mock_render_process.h

Index: content/test/mock_render_process.h
diff --git a/content/test/mock_render_process.h b/content/test/mock_render_process.h
index 6068dbae39711756d8c8a809751d76decc86de0b..2dc20eed767204208b1c439da79456185fb42b11 100644
--- a/content/test/mock_render_process.h
+++ b/content/test/mock_render_process.h
@@ -13,11 +13,11 @@ namespace content {
 class MockRenderProcess : public RenderProcess {
  public:
   MockRenderProcess();
-  virtual ~MockRenderProcess();
+  ~MockRenderProcess() override;
 
   // RenderProcess implementation.
-  virtual void AddBindings(int bindings) override;
-  virtual int GetEnabledBindings() const override;
+  void AddBindings(int bindings) override;
+  int GetEnabledBindings() const override;
 
  private:
   int enabled_bindings_;