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

chrome/renderer/pepper/chrome_pdf_print_client.h

Index: chrome/renderer/pepper/chrome_pdf_print_client.h
diff --git a/chrome/renderer/pepper/chrome_pdf_print_client.h b/chrome/renderer/pepper/chrome_pdf_print_client.h
index 054e4beb8cbde6277d37e13a26f4abda1b43638a..5faed3205d17530538716546b79e90b787eb8e78 100644
--- a/chrome/renderer/pepper/chrome_pdf_print_client.h
+++ b/chrome/renderer/pepper/chrome_pdf_print_client.h
@@ -11,12 +11,12 @@
 class ChromePDFPrintClient : public pdf::PPB_PDF_Impl::PrintClient {
  public:
   ChromePDFPrintClient();
-  virtual ~ChromePDFPrintClient();
+  ~ChromePDFPrintClient() override;
 
  private:
   // pdf::PPB_PDF_Impl::PrintClient:
-  virtual bool IsPrintingEnabled(PP_Instance instance_id) override;
-  virtual bool Print(PP_Instance instance_id) override;
+  bool IsPrintingEnabled(PP_Instance instance_id) override;
+  bool Print(PP_Instance instance_id) override;
 
   DISALLOW_COPY_AND_ASSIGN(ChromePDFPrintClient);
 };