Standardize usage of virtual/override/final in net/

net/dns/dns_socket_pool.cc

Index: net/dns/dns_socket_pool.cc
diff --git a/net/dns/dns_socket_pool.cc b/net/dns/dns_socket_pool.cc
index 09aca5a83ce23e58e892e3991fa7fcc517529977..2c3c8c273576b4aa52b5c9e1fa76537f590c693d 100644
--- a/net/dns/dns_socket_pool.cc
+++ b/net/dns/dns_socket_pool.cc
@@ -95,21 +95,18 @@ class NullDnsSocketPool : public DnsSocketPool {
      : DnsSocketPool(factory) {
   }
 
-  virtual void Initialize(
-      const std::vector<IPEndPoint>* nameservers,
-      NetLog* net_log) override {
+  void Initialize(const std::vector<IPEndPoint>* nameservers,
+                  NetLog* net_log) override {
     InitializeInternal(nameservers, net_log);
   }
 
-  virtual scoped_ptr<DatagramClientSocket> AllocateSocket(
+  scoped_ptr<DatagramClientSocket> AllocateSocket(
       unsigned server_index) override {
     return CreateConnectedSocket(server_index);
   }
 
-  virtual void FreeSocket(
-      unsigned server_index,
-      scoped_ptr<DatagramClientSocket> socket) override {
-  }
+  void FreeSocket(unsigned server_index,
+                  scoped_ptr<DatagramClientSocket> socket) override {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(NullDnsSocketPool);
@@ -127,18 +124,16 @@ class DefaultDnsSocketPool : public DnsSocketPool {
      : DnsSocketPool(factory) {
   };
 
-  virtual ~DefaultDnsSocketPool();
+  ~DefaultDnsSocketPool() override;
 
-  virtual void Initialize(
-      const std::vector<IPEndPoint>* nameservers,
-      NetLog* net_log) override;
+  void Initialize(const std::vector<IPEndPoint>* nameservers,
+                  NetLog* net_log) override;
 
-  virtual scoped_ptr<DatagramClientSocket> AllocateSocket(
+  scoped_ptr<DatagramClientSocket> AllocateSocket(
       unsigned server_index) override;
 
-  virtual void FreeSocket(
-      unsigned server_index,
-      scoped_ptr<DatagramClientSocket> socket) override;
+  void FreeSocket(unsigned server_index,
+                  scoped_ptr<DatagramClientSocket> socket) override;
 
  private:
   void FillPool(unsigned server_index, unsigned size);