Restrict QUIC session pool when channel ID is present.

net/quic/test_tools/quic_client_session_peer.h

Index: net/quic/test_tools/quic_client_session_peer.h
diff --git a/net/quic/test_tools/quic_client_session_peer.h b/net/quic/test_tools/quic_client_session_peer.h
index 7217d9d860008c5116f9f86052f350b4885f9b10..440982a295a1ce359292ba1793b1695f092752f3 100644
--- a/net/quic/test_tools/quic_client_session_peer.h
+++ b/net/quic/test_tools/quic_client_session_peer.h
@@ -9,6 +9,7 @@
 
 namespace net {
 
+class ChannelIDKey;
 class QuicClientSession;
 
 namespace test {
@@ -19,6 +20,9 @@ class QuicClientSessionPeer {
                                 size_t max_streams,
                                 size_t default_streams);
 
+  static void SetChannelIDKey(QuicClientSession* session,
+                              ChannelIDKey* channel_id_key);
+
  private:
   DISALLOW_COPY_AND_ASSIGN(QuicClientSessionPeer);
 };