Add the override annotation to all necessary methods in .../quic/.

net/quic/quic_crypto_client_stream.h

Index: net/quic/quic_crypto_client_stream.h
diff --git a/net/quic/quic_crypto_client_stream.h b/net/quic/quic_crypto_client_stream.h
index 1ca423f012b25c022000d69ac2cc0cdb77d20c87..83a5315838b0a3f2e80a5259d061bab4f139f393 100644
--- a/net/quic/quic_crypto_client_stream.h
+++ b/net/quic/quic_crypto_client_stream.h
@@ -29,7 +29,7 @@ class NET_EXPORT_PRIVATE QuicCryptoClientStream : public QuicCryptoStream {
   QuicCryptoClientStream(const string& server_hostname,
                          QuicSession* session,
                          QuicCryptoClientConfig* crypto_config);
-  virtual ~QuicCryptoClientStream();
+  virtual ~QuicCryptoClientStream() OVERRIDE;
 
   // CryptoFramerVisitorInterface implementation
   virtual void OnHandshakeMessage(
@@ -55,7 +55,7 @@ class NET_EXPORT_PRIVATE QuicCryptoClientStream : public QuicCryptoStream {
   class ProofVerifierCallbackImpl : public ProofVerifierCallback {
    public:
     explicit ProofVerifierCallbackImpl(QuicCryptoClientStream* stream);
-    virtual ~ProofVerifierCallbackImpl();
+    virtual ~ProofVerifierCallbackImpl() OVERRIDE;
 
     // ProofVerifierCallback interface.
     virtual void Run(bool ok,