Standardize usage of virtual/override/final specifiers in jingle/.

jingle/glue/proxy_resolving_client_socket_unittest.cc

Index: jingle/glue/proxy_resolving_client_socket_unittest.cc
diff --git a/jingle/glue/proxy_resolving_client_socket_unittest.cc b/jingle/glue/proxy_resolving_client_socket_unittest.cc
index 0fda0ff4d67aedbb11258905f020280d42be209f..2ba81b2224e927f75c9807639808bc1d8aa91dae 100644
--- a/jingle/glue/proxy_resolving_client_socket_unittest.cc
+++ b/jingle/glue/proxy_resolving_client_socket_unittest.cc
@@ -40,9 +40,9 @@ class ProxyResolvingClientSocketTest : public testing::Test {
             scoped_ptr<net::TestURLRequestContext>(
                 new MyTestURLRequestContext))) {}
 
-  virtual ~ProxyResolvingClientSocketTest() {}
+  ~ProxyResolvingClientSocketTest() override {}
 
-  virtual void TearDown() {
+  void TearDown() override {
     // Clear out any messages posted by ProxyResolvingClientSocket's
     // destructor.
     message_loop_.RunUntilIdle();