Remove some unnecessary using directives from tests.

net/tools/quic/quic_simple_server_test.cc

 // Copyright 2014 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/tools/quic/quic_simple_server.h"
 
 #include "net/quic/core/crypto/quic_random.h"
 #include "net/quic/core/quic_crypto_stream.h"
 #include "net/quic/core/quic_utils.h"
 #include "net/quic/test_tools/crypto_test_utils.h"
 #include "net/quic/test_tools/mock_quic_dispatcher.h"
 #include "net/quic/test_tools/quic_test_utils.h"
 #include "net/tools/quic/quic_simple_server_session_helper.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using ::testing::_;
-using net::test::CryptoTestUtils;
 
 namespace net {
 namespace test {
 
 // TODO(dmz) Remove "Chrome" part of name once net/tools/quic is deleted.
 class QuicChromeServerDispatchPacketTest : public ::testing::Test {
  public:
   QuicChromeServerDispatchPacketTest()
       : crypto_config_("blah",
                        QuicRandom::GetInstance(),
@@ skipping 40 matching lines @@
   QuicReceivedPacket encrypted_valid_packet(
       reinterpret_cast<char*>(valid_packet), arraysize(valid_packet),
       QuicTime::Zero(), false);
 
   EXPECT_CALL(dispatcher_, ProcessPacket(_, _, _)).Times(1);
   DispatchPacket(encrypted_valid_packet);
 }
 
 }  // namespace test
 }  // namespace net