Restrict QUIC session pool when channel ID is present.

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 9a6ebb2b490f474bf365c2ef8464620ffd6f0a60..edb0c359453c41f6aa121b5aa96a557a47df521f 100644
--- a/net/quic/quic_crypto_client_stream.h
+++ b/net/quic/quic_crypto_client_stream.h
@@ -20,6 +20,7 @@ class QuicClientSessionBase;
 
 namespace test {
 class CryptoTestUtils;
+class QuicClientSessionPeer;
 }  // namespace test
 
 class NET_EXPORT_PRIVATE QuicCryptoClientStream : public QuicCryptoStream {
@@ -44,6 +45,9 @@ class NET_EXPORT_PRIVATE QuicCryptoClientStream : public QuicCryptoStream {
   // 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;
+
  private:
   // ChannelIDSourceCallbackImpl is passed as the callback method to
   // GetChannelIDKey. The ChannelIDSource calls this class with the result of
@@ -86,6 +90,7 @@ class NET_EXPORT_PRIVATE QuicCryptoClientStream : public QuicCryptoStream {
   };
 
   friend class test::CryptoTestUtils;
+  friend class test::QuicClientSessionPeer;
 
   enum State {
     STATE_IDLE,