Standardize usage of virtual/override/final specifiers.

extensions/shell/browser/shell_network_delegate.h

Index: extensions/shell/browser/shell_network_delegate.h
diff --git a/extensions/shell/browser/shell_network_delegate.h b/extensions/shell/browser/shell_network_delegate.h
index 5d8635ade4eb4ab9d7244460cae40fd41944bdd5..7b60bab3c34af60a7a8a7533b60186d282e5a0c2 100644
--- a/extensions/shell/browser/shell_network_delegate.h
+++ b/extensions/shell/browser/shell_network_delegate.h
@@ -15,34 +15,33 @@ class InfoMap;
 class ShellNetworkDelegate : public net::NetworkDelegate {
  public:
   ShellNetworkDelegate(void* browser_context, InfoMap* extension_info_map);
-  virtual ~ShellNetworkDelegate();
+  ~ShellNetworkDelegate() override;
 
   static void SetAcceptAllCookies(bool accept);
 
  private:
   // NetworkDelegate implementation.
-  virtual int OnBeforeURLRequest(net::URLRequest* request,
-                                 const net::CompletionCallback& callback,
-                                 GURL* new_url) override;
-  virtual int OnBeforeSendHeaders(net::URLRequest* request,
-                                  const net::CompletionCallback& callback,
-                                  net::HttpRequestHeaders* headers) override;
-  virtual void OnSendHeaders(net::URLRequest* request,
-                             const net::HttpRequestHeaders& headers) override;
-  virtual int OnHeadersReceived(
+  int OnBeforeURLRequest(net::URLRequest* request,
+                         const net::CompletionCallback& callback,
+                         GURL* new_url) override;
+  int OnBeforeSendHeaders(net::URLRequest* request,
+                          const net::CompletionCallback& callback,
+                          net::HttpRequestHeaders* headers) override;
+  void OnSendHeaders(net::URLRequest* request,
+                     const net::HttpRequestHeaders& headers) override;
+  int OnHeadersReceived(
       net::URLRequest* request,
       const net::CompletionCallback& callback,
       const net::HttpResponseHeaders* original_response_headers,
       scoped_refptr<net::HttpResponseHeaders>* override_response_headers,
       GURL* allowed_unsafe_redirect_url) override;
-  virtual void OnBeforeRedirect(net::URLRequest* request,
-                                const GURL& new_location) override;
-  virtual void OnResponseStarted(net::URLRequest* request) override;
-  virtual void OnCompleted(net::URLRequest* request, bool started) override;
-  virtual void OnURLRequestDestroyed(net::URLRequest* request) override;
-  virtual void OnPACScriptError(int line_number,
-                                const base::string16& error) override;
-  virtual net::NetworkDelegate::AuthRequiredResponse OnAuthRequired(
+  void OnBeforeRedirect(net::URLRequest* request,
+                        const GURL& new_location) override;
+  void OnResponseStarted(net::URLRequest* request) override;
+  void OnCompleted(net::URLRequest* request, bool started) override;
+  void OnURLRequestDestroyed(net::URLRequest* request) override;
+  void OnPACScriptError(int line_number, const base::string16& error) override;
+  net::NetworkDelegate::AuthRequiredResponse OnAuthRequired(
       net::URLRequest* request,
       const net::AuthChallengeInfo& auth_info,
       const AuthCallback& callback,