Update {virtual,override} to follow C++11 style in chrome.

chrome/browser/first_run/try_chrome_dialog_view.h

Index: chrome/browser/first_run/try_chrome_dialog_view.h
diff --git a/chrome/browser/first_run/try_chrome_dialog_view.h b/chrome/browser/first_run/try_chrome_dialog_view.h
index eebe9ce442131655fc393dc8835bb1708c8ac30a..48ed05836842c32965f9f1266c68d806bc4e471d 100644
--- a/chrome/browser/first_run/try_chrome_dialog_view.h
+++ b/chrome/browser/first_run/try_chrome_dialog_view.h
@@ -103,13 +103,12 @@ class TryChromeDialogView : public views::ButtonListener,
   // views::ButtonListener:
   // We have two buttons and according to what the user clicked we set |result_|
   // and we should always close and end the modal loop.
-  virtual void ButtonPressed(views::Button* sender,
-                             const ui::Event& event) override;
+  void ButtonPressed(views::Button* sender, const ui::Event& event) override;
 
   // views::LinkListener:
   // If the user selects the link we need to fire off the default browser that
   // by some convoluted logic should not be chrome.
-  virtual void LinkClicked(views::Link* source, int event_flags) override;
+  void LinkClicked(views::Link* source, int event_flags) override;
 
   // Controls which flavor of the heading text to use.
   size_t flavor_;