Remove |using base::StringPiece| from net/spdy header files.

net/tools/flip_server/spdy_interface.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.
 
 #ifndef NET_TOOLS_FLIP_SERVER_SPDY_INTERFACE_H_
 #define NET_TOOLS_FLIP_SERVER_SPDY_INTERFACE_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 122 matching lines @@
 
   // Called when a PING frame has been parsed.
   void OnPing(SpdyPingId unique_id, bool is_ack) override {}
 
   // Called when a RST_STREAM frame has been parsed.
   void OnRstStream(SpdyStreamId stream_id, SpdyRstStreamStatus status) override;
 
   // Called when a GOAWAY frame has been parsed.
   void OnGoAway(SpdyStreamId last_accepted_stream_id,
                 SpdyGoAwayStatus status,
-                StringPiece debug_data) override {}
+                base::StringPiece debug_data) override {}
 
   // Called when a WINDOW_UPDATE frame has been parsed.
   void OnWindowUpdate(SpdyStreamId stream_id, int delta_window_size) override {}
 
   // Called when a PUSH_PROMISE frame has been parsed.
   void OnPushPromise(SpdyStreamId stream_id,
                      SpdyStreamId promised_stream_id,
                      const SpdyHeaderBlock& headers) override {}
 
   bool OnUnknownFrame(SpdyStreamId stream_id, int frame_type) override;
@@ skipping 77 matching lines @@
   typedef std::map<uint32, SMInterface*> StreamToSmif;
   StreamToSmif stream_to_smif_;
   bool close_on_error_;
 
   static std::string forward_ip_header_;
 };
 
 }  // namespace net
 
 #endif  // NET_TOOLS_FLIP_SERVER_SPDY_INTERFACE_H_