Implement the variable length changes necessary to easily accommodate

net/quic/test_tools/quic_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.
 //
 // Common utilities for Quic tests
 
 #ifndef NET_QUIC_TEST_TOOLS_QUIC_TEST_UTILS_H_
 #define NET_QUIC_TEST_TOOLS_QUIC_TEST_UTILS_H_
 
 #include <string>
@@ skipping 17 matching lines @@
 void CompareCharArraysWithHexError(const std::string& description,
                                    const char* actual,
                                    const int actual_len,
                                    const char* expected,
                                    const int expected_len);
 
 void CompareQuicDataWithHexError(const std::string& description,
                                  QuicData* actual,
                                  QuicData* expected);
 
-// Returns the length of the QuicPacket that will be created if it contains
-// a stream frame that has |payload| bytes.
+// Returns the length of a QuicPacket that is capable of holding either a
+// stream frame or a minimal ack frame.  Sets |*payload_length| to the number
+// of bytes of stream data that will fit in such a packet.
 size_t GetPacketLengthForOneStream(
-    bool include_version, InFecGroup is_in_fec_group, size_t payload);
+    bool include_version, InFecGroup is_in_fec_group, size_t* payload_length);
 
 string SerializeUncompressedHeaders(const SpdyHeaderBlock& headers);
 
 // Returns QuicConfig set to default values.
 QuicConfig DefaultQuicConfig();
 
 class MockFramerVisitor : public QuicFramerVisitorInterface {
  public:
   MockFramerVisitor();
   ~MockFramerVisitor();
@@ skipping 311 matching lines @@
 
  private:
   string data_;
   bool error_;
 };
 
 }  // namespace test
 }  // namespace net
 
 #endif  // NET_QUIC_TEST_TOOLS_QUIC_TEST_UTILS_H_