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

chrome/browser/extensions/api/socket/tcp_socket_unittest.cc

Index: chrome/browser/extensions/api/socket/tcp_socket_unittest.cc
diff --git a/chrome/browser/extensions/api/socket/tcp_socket_unittest.cc b/chrome/browser/extensions/api/socket/tcp_socket_unittest.cc
index 91f9b74ddd96c2ed80133292cfee5e12d21c85eb..e372f00ee6956a5690f6be12327c5a91414a6c89 100644
--- a/chrome/browser/extensions/api/socket/tcp_socket_unittest.cc
+++ b/chrome/browser/extensions/api/socket/tcp_socket_unittest.cc
@@ -33,7 +33,7 @@ class MockTCPSocket : public net::TCPClientSocket {
                           const net::CompletionCallback& callback));
   MOCK_METHOD2(SetKeepAlive, bool(bool enable, int delay));
   MOCK_METHOD1(SetNoDelay, bool(bool no_delay));
-  virtual bool IsConnected() const override {
+  bool IsConnected() const override {
     return true;
   }