Use TicketCrypter to enable TLS session resumption in QUIC.

gfe-relnote: Adds support for session resumption in TLS-based versions of QUIC. Protected by quic_enable_tls_resumption.
PiperOrigin-RevId: 308357681
Change-Id: I3889a8eec65d3903967d6ab1ca7c1b997da79606

quic/test_tools/fake_proof_source.h

diff --git a/quic/test_tools/fake_proof_source.h b/quic/test_tools/fake_proof_source.h
index ef7669d..c179f59 100644
--- a/quic/test_tools/fake_proof_source.h
+++ b/quic/test_tools/fake_proof_source.h
@@ -15,10 +15,13 @@
 namespace quic {
 namespace test {
 
-// Implementation of ProofSource which delegates to a ProofSourceForTesting,
-// except that when the async GetProof is called, it captures the call and
-// allows tests to see that a call is pending, which they can then cause to
-// complete at a time of their choosing.
+// Implementation of ProofSource which delegates to a ProofSourceForTesting, but
+// allows for overriding certain functionality. FakeProofSource allows
+// intercepting calls to GetProof and ComputeTlsSignature to force them to run
+// asynchronously, and allow the caller to see that the call is pending and
+// resume the operation at the caller's choosing. FakeProofSource also allows
+// the caller to replace the TicketCrypter provided by
+// FakeProofSource::SessionTicketCrypter.
 class FakeProofSource : public ProofSource {
  public:
   FakeProofSource();
@@ -46,9 +49,12 @@
       uint16_t signature_algorithm,
       quiche::QuicheStringPiece in,
       std::unique_ptr<ProofSource::SignatureCallback> callback) override;
-
   TicketCrypter* SessionTicketCrypter() override;
 
+  // Sets the TicketCrypter to use. If nullptr, the TicketCrypter from
+  // ProofSourceForTesting will be returned instead.
+  void SetTicketCrypter(std::unique_ptr<TicketCrypter> ticket_crypter);
+
   // Get the number of callbacks which are pending
   int NumPendingCallbacks() const;
 
@@ -58,6 +64,7 @@
 
  private:
   std::unique_ptr<ProofSource> delegate_;
+  std::unique_ptr<TicketCrypter> ticket_crypter_;
   bool active_ = false;
 
   class PendingOp {