Change the prototype of ChannelIDSource::GetChannelIDKey() to allow an

net/quic/test_tools/crypto_test_utils.h

 // Copyright (c) 2012 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_TEST_TOOLS_CRYPTO_TEST_UTILS_H_
 #define NET_QUIC_TEST_TOOLS_CRYPTO_TEST_UTILS_H_
 
 #include <stdarg.h>
 
 #include <utility>
@@ skipping 115 matching lines @@
   static CryptoHandshakeMessage Message(const char* message_tag, ...);
 
   // BuildMessage is the same as |Message|, but takes the variable arguments
   // explicitly. TODO(rtenneti): Investigate whether it'd be better for
   // Message() and BuildMessage() to return a CryptoHandshakeMessage* pointer
   // instead, to avoid copying the return value.
   static CryptoHandshakeMessage BuildMessage(const char* message_tag,
                                              va_list ap);
 
   // ChannelIDSourceForTesting returns a ChannelIDSource that generates keys
-  // deterministically based on the hostname given in the GetChannelID call.
+  // deterministically based on the hostname given in the GetChannelIDKey call.
+  // This ChannelIDSource works in synchronous mode, i.e., its GetChannelIDKey
+  // method never returns QUIC_PENDING.
   static ChannelIDSource* ChannelIDSourceForTesting();
 
  private:
   static void CompareClientAndServerKeys(QuicCryptoClientStream* client,
                                          QuicCryptoServerStream* server);
 
   DISALLOW_COPY_AND_ASSIGN(CryptoTestUtils);
 };
 
 }  // namespace test
 
 }  // namespace net
 
 #endif  // NET_QUIC_TEST_TOOLS_CRYPTO_TEST_UTILS_H_