Standardize usage of virtual/override/final specifiers.

chrome/browser/ui/views/open_pdf_in_reader_bubble_view.h

Index: chrome/browser/ui/views/open_pdf_in_reader_bubble_view.h
diff --git a/chrome/browser/ui/views/open_pdf_in_reader_bubble_view.h b/chrome/browser/ui/views/open_pdf_in_reader_bubble_view.h
index 1072fa6d5f8d44e8c7a3a225cfdcbf345fa3554f..003eb575d6ca72ca8093d34ea8b2974052bf462a 100644
--- a/chrome/browser/ui/views/open_pdf_in_reader_bubble_view.h
+++ b/chrome/browser/ui/views/open_pdf_in_reader_bubble_view.h
@@ -23,18 +23,17 @@ class OpenPDFInReaderBubbleView : public views::BubbleDelegateView,
  public:
   OpenPDFInReaderBubbleView(views::View* anchor_view,
                             pdf::OpenPDFInReaderPromptClient* model);
-  virtual ~OpenPDFInReaderBubbleView();
+  ~OpenPDFInReaderBubbleView() override;
 
  protected:
   // views::BubbleDelegateView:
-  virtual void Init() override;
+  void Init() override;
 
   // views::ButtonListener:
-  virtual void ButtonPressed(views::Button* sender,
-                             const ui::Event& event) override;
+  void ButtonPressed(views::Button* sender, const ui::Event& event) override;
 
   // views::LinkListener:
-  virtual void LinkClicked(views::Link* source, int event_flags) override;
+  void LinkClicked(views::Link* source, int event_flags) override;
 
  private:
   // Weak pointer; owned by the PDFWebContentsHelper of the currently active