Add a QuicChromiumClock and make QuicClock abstract to match internal code.

net/quic/quartc/quartc_session.h

 // Copyright (c) 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_QUIC_QUARTC_QUARTC_SESSION_H_
 #define NET_QUIC_QUARTC_QUARTC_SESSION_H_
 
 #include "net/base/net_export.h"
 #include "net/quic/core/quic_crypto_client_stream.h"
 #include "net/quic/core/quic_crypto_server_stream.h"
 #include "net/quic/core/quic_crypto_stream.h"
 #include "net/quic/core/quic_session.h"
+#include "net/quic/platform/impl/quic_chromium_clock.h"
 #include "net/quic/quartc/quartc_session_interface.h"
 #include "net/quic/quartc/quartc_stream.h"
 
 namespace net {
 
 // A helper class is used by the QuicCryptoServerStream.
 class QuartcCryptoServerStreamHelper : public QuicCryptoServerStream::Helper {
  public:
   QuicConnectionId GenerateConnectionIdForReject(
       QuicConnectionId connection_id) const override;
@@ skipping 67 matching lines @@
  protected:
   // QuicSession override.
   QuicStream* CreateIncomingDynamicStream(QuicStreamId id) override;
 
   QuartcStream* CreateDataStream(QuicStreamId id, SpdyPriority priority);
 
  private:
   // For crypto handshake.
   std::unique_ptr<QuicCryptoStream> crypto_stream_;
   // For recording packet receipt time
-  QuicClock clock_;
+  QuicChromiumClock clock_;
   const std::string unique_remote_server_id_;
   Perspective perspective_;
   // Take the ownership of the QuicConnection.
   std::unique_ptr<QuicConnection> connection_;
   // Not owned by QuartcSession. From the QuartcFactory.
   QuicConnectionHelperInterface* helper_;
   // Not owned by QuartcSession.
   QuartcSessionInterface::Delegate* session_delegate_ = nullptr;
   // Used by QUIC crypto server stream to track most recently compressed certs.
   std::unique_ptr<QuicCompressedCertsCache> quic_compressed_certs_cache_;
   // This helper is needed when create QuicCryptoServerStream.
   QuartcCryptoServerStreamHelper stream_helper_;
   // Config for QUIC crypto client stream, used by the client.
   std::unique_ptr<QuicCryptoClientConfig> quic_crypto_client_config_;
   // Config for QUIC crypto server stream, used by the server.
   std::unique_ptr<QuicCryptoServerConfig> quic_crypto_server_config_;
 
   DISALLOW_COPY_AND_ASSIGN(QuartcSession);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUARTC_QUARTC_SESSION_H_