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

content/renderer/android/address_detector.h

Index: content/renderer/android/address_detector.h
diff --git a/content/renderer/android/address_detector.h b/content/renderer/android/address_detector.h
index e612339adf447bb6b4d6d3191cbf3eb2853d4eb7..1db869ef167a47c14516c2558c333ded92493049 100644
--- a/content/renderer/android/address_detector.h
+++ b/content/renderer/android/address_detector.h
@@ -15,17 +15,17 @@ namespace content {
 class AddressDetector : public ContentDetector {
  public:
   AddressDetector();
-  virtual ~AddressDetector();
+  ~AddressDetector() override;
 
  private:
   // Implementation of ContentDetector.
-  virtual bool FindContent(const base::string16::const_iterator& begin,
-                           const base::string16::const_iterator& end,
-                           size_t* start_pos,
-                           size_t* end_pos,
-                           std::string* content_text) override;
-  virtual GURL GetIntentURL(const std::string& content_text) override;
-  virtual size_t GetMaximumContentLength() override;
+  bool FindContent(const base::string16::const_iterator& begin,
+                   const base::string16::const_iterator& end,
+                   size_t* start_pos,
+                   size_t* end_pos,
+                   std::string* content_text) override;
+  GURL GetIntentURL(const std::string& content_text) override;
+  size_t GetMaximumContentLength() override;
 
   std::string GetContentText(const base::string16& text);