Rename HandshakerDelegate to HandshakerInterface in QuicCryptoServerStream
and QuicCryptoClientStream to make it clear that this is an interface which
defines the handshaker as opposed to a delegate of the handshaker (Which is
defined by the similarly named HandshakerDelegateInterface).

gfe-relnote: n/a - Rename only
PiperOrigin-RevId: 286924355
Change-Id: Ifb31cf8f7afd6aa0560c599fc28cbf9c9f3655b4
diff --git a/quic/core/quic_crypto_client_stream.h b/quic/core/quic_crypto_client_stream.h
index 3f9b0af..cf1d3e9 100644
--- a/quic/core/quic_crypto_client_stream.h
+++ b/quic/core/quic_crypto_client_stream.h
@@ -62,20 +62,20 @@
   //     the client a fallback ServerConfig.
   static const int kMaxClientHellos = 4;
 
-  // QuicCryptoClientStream creates a HandshakerDelegate at construction time
+  // QuicCryptoClientStream creates a HandshakerInterface at construction time
   // based on the QuicTransportVersion of the connection. Different
-  // HandshakerDelegates provide implementations of different crypto handshake
+  // HandshakerInterfaces provide implementations of different crypto handshake
   // protocols. Currently QUIC crypto is the only protocol implemented; a future
-  // HandshakerDelegate will use TLS as the handshake protocol.
+  // HandshakerInterface will use TLS as the handshake protocol.
   // QuicCryptoClientStream delegates all of its public methods to its
-  // HandshakerDelegate.
+  // HandshakerInterface.
   //
   // This setup of the crypto stream delegating its implementation to the
   // handshaker results in the handshaker reading and writing bytes on the
   // crypto stream, instead of the handshaker passing the stream bytes to send.
-  class QUIC_EXPORT_PRIVATE HandshakerDelegate {
+  class QUIC_EXPORT_PRIVATE HandshakerInterface {
    public:
-    virtual ~HandshakerDelegate() {}
+    virtual ~HandshakerInterface() {}
 
     // Performs a crypto handshake with the server. Returns true if the
     // connection is still connected.
@@ -167,12 +167,12 @@
   std::string chlo_hash() const;
 
  protected:
-  void set_handshaker(std::unique_ptr<HandshakerDelegate> handshaker) {
+  void set_handshaker(std::unique_ptr<HandshakerInterface> handshaker) {
     handshaker_ = std::move(handshaker);
   }
 
  private:
-  std::unique_ptr<HandshakerDelegate> handshaker_;
+  std::unique_ptr<HandshakerInterface> handshaker_;
 };
 
 }  // namespace quic