Remove some duplicate code in quic tests.

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 19 matching lines @@
 
 // Lower limit on versions we support.
 QuicVersion QuicVersionMin();
 
 void CompareCharArraysWithHexError(const std::string& description,
                                    const char* actual,
                                    const int actual_len,
                                    const char* expected,
                                    const int expected_len);
 
+bool DecodeHexString(const base::StringPiece& hex, std::string* 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(
     QuicVersion version,
     bool include_version,
     QuicSequenceNumberLength sequence_number_length,
     InFecGroup is_in_fec_group,
     size_t* payload_length);
 
@@ skipping 364 matching lines @@
   MockAckNotifierDelegate();
   virtual ~MockAckNotifierDelegate();
 
   MOCK_METHOD0(OnAckNotification, void());
 };
 
 }  // namespace test
 }  // namespace net
 
 #endif  // NET_QUIC_TEST_TOOLS_QUIC_TEST_UTILS_H_