Remove some unnecessary using directives from tests.

net/tools/quic/quic_simple_server_stream_test.cc

 // Copyright (c) 2013 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_stream.h"
 
 #include <list>
 #include <memory>
 #include <utility>
 
@@ skipping 11 matching lines @@
 #include "net/quic/test_tools/quic_test_utils.h"
 #include "net/test/gtest_util.h"
 #include "net/tools/epoll_server/epoll_server.h"
 #include "net/tools/quic/quic_http_response_cache.h"
 #include "net/tools/quic/quic_simple_server_session.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "url/gurl.h"
 
 using base::StringPiece;
-using net::test::MockQuicConnection;
-using net::test::MockQuicConnectionHelper;
-using net::test::MockQuicSpdySession;
-using net::test::QuicStreamPeer;
-using net::test::SupportedVersions;
-using net::test::kInitialSessionFlowControlWindowForTest;
-using net::test::kInitialStreamFlowControlWindowForTest;
 using std::string;
 using testing::_;
 using testing::AnyNumber;
 using testing::Invoke;
 using testing::InvokeArgument;
 using testing::InSequence;
 using testing::Return;
 using testing::StrictMock;
 using testing::WithArgs;
 
@@ skipping 595 matching lines @@
   };
   StringPiece data(arr, arraysize(arr));
   QuicStreamFrame frame(stream_->id(), true, 0, data);
   // Verify that we don't crash when we get a invalid headers in stream frame.
   stream_->OnStreamFrame(frame);
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace net