Move test only MakeIOVector method to test_tools/quic_test_utils.h. No behavior change.

net/quic/core/quic_packet_generator_test.cc

 // 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.
 
 #include "net/quic/core/quic_packet_generator.h"
 
 #include <cstdint>
 #include <memory>
 #include <string>
 
@@ skipping 185 matching lines @@
 
   QuicIOVector CreateData(size_t len) {
     data_array_.reset(new char[len]);
     memset(data_array_.get(), '?', len);
     iov_.iov_base = data_array_.get();
     iov_.iov_len = len;
     return QuicIOVector(&iov_, 1, len);
   }
 
   QuicIOVector MakeIOVector(StringPiece s) {
-    return ::net::MakeIOVector(s, &iov_);
+    return ::net::test::MakeIOVector(s, &iov_);
   }
 
   QuicFramer framer_;
   SimpleBufferAllocator buffer_allocator_;
   StrictMock<MockDelegate> delegate_;
   QuicPacketGenerator generator_;
   QuicPacketCreator* creator_;
   SimpleQuicFramer simple_framer_;
   std::vector<SerializedPacket> packets_;
   QuicAckFrame ack_frame_;
@@ skipping 667 matching lines @@
   frame->error_details = error_details.as_string();
   EXPECT_CALL(delegate_,
               OnUnrecoverableError(QUIC_FAILED_TO_SERIALIZE_PACKET,
                                    "Single frame cannot fit into a packet", _));
   EXPECT_QUIC_BUG(generator_.AddControlFrame(QuicFrame(frame)), "");
   EXPECT_TRUE(generator_.HasQueuedFrames());
 }
 
 }  // namespace test
 }  // namespace net