net: Update the include paths of base/string_piece.h to its new location.

net/spdy/spdy_stream_spdy2_unittest.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 <cstddef>
 #include <string>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/string_piece.h"
+#include "base/strings/string_piece.h"
 #include "net/base/completion_callback.h"
 #include "net/base/net_log_unittest.h"
 #include "net/base/request_priority.h"
 #include "net/spdy/buffered_spdy_framer.h"
-#include "net/spdy/spdy_stream.h"
 #include "net/spdy/spdy_http_utils.h"
 #include "net/spdy/spdy_protocol.h"
 #include "net/spdy/spdy_session.h"
+#include "net/spdy/spdy_stream.h"
 #include "net/spdy/spdy_stream_test_util.h"
 #include "net/spdy/spdy_test_util_common.h"
 #include "net/spdy/spdy_test_util_spdy2.h"
 #include "net/spdy/spdy_websocket_test_util_spdy2.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using namespace net::test_spdy2;
 
 // TODO(ukai): factor out common part with spdy_http_stream_unittest.cc
 //
@@ skipping 316 matching lines @@
   int stream_id2;
   ASSERT_TRUE(entries[pos].GetIntegerValue("stream_id", &stream_id2));
   EXPECT_EQ(static_cast<int>(stream_id), stream_id2);
 }
 
 }  // namespace
 
 }  // namespace test
 
 }  // namespace net