Factor QuicCryptoClientStream APIs into QuicCryptoClientStreamBase.

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 edfc1f58e3976ba13946406b0aa230fb3e9e6052..6f98ab7703f63972c9b00add8c4bd45c6eadceb0 100644
--- a/net/quic/quic_crypto_client_stream.h
+++ b/net/quic/quic_crypto_client_stream.h
@@ -23,7 +23,22 @@ class CryptoTestUtils;
 class QuicChromiumClientSessionPeer;
 }  // namespace test
 
-class NET_EXPORT_PRIVATE QuicCryptoClientStream : public QuicCryptoStream {
+class NET_EXPORT_PRIVATE QuicCryptoClientStreamBase : public QuicCryptoStream {
+ public:
+  explicit QuicCryptoClientStreamBase(QuicClientSessionBase* session);
+
+  ~QuicCryptoClientStreamBase() override {};
+
+  // Performs a crypto handshake with the server.
+  virtual void CryptoConnect() = 0;
+
+  // num_sent_client_hellos returns the number of client hello messages that
+  // have been sent. If the handshake has completed then this is one greater
+  // than the number of round-trips needed for the handshake.
+  virtual int num_sent_client_hellos() const = 0;
+};
+
+class NET_EXPORT_PRIVATE QuicCryptoClientStream : public QuicCryptoClientStreamBase {
  public:
   // kMaxClientHellos is the maximum number of times that we'll send a client
   // hello. The value 3 accounts for:
@@ -32,24 +47,20 @@ class NET_EXPORT_PRIVATE QuicCryptoClientStream : public QuicCryptoStream {
   //     the server being unwilling to send it without a valid source-address
   //     token.
   static const int kMaxClientHellos = 3;
-
   QuicCryptoClientStream(const QuicServerId& server_id,
                          QuicClientSessionBase* session,
                          ProofVerifyContext* verify_context,
                          QuicCryptoClientConfig* crypto_config);
+
   ~QuicCryptoClientStream() override;
 
+  // From QuicCryptoClientStreamBase
+  void CryptoConnect() override;
+  int num_sent_client_hellos() const override;
+
   // CryptoFramerVisitorInterface implementation
   void OnHandshakeMessage(const CryptoHandshakeMessage& message) override;
 
-  // Performs a crypto handshake with the server.
-  virtual void CryptoConnect();
-
-  // num_sent_client_hellos returns the number of client hello messages that
-  // have been sent. If the handshake has completed then this is one greater
-  // than the number of round-trips needed for the handshake.
-  int num_sent_client_hellos() const;
-
   // Returns true if a channel ID was sent on this connection.
   bool WasChannelIDSent() const;