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

net/tools/quic/quic_in_memory_cache.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_QUIC_QUIC_IN_MEMORY_CACHE_H_
 #define NET_TOOLS_QUIC_QUIC_IN_MEMORY_CACHE_H_
 
 #include <string>
 
 #include "base/containers/hash_tables.h"
@@ skipping 28 matching lines @@
   };
 
   // Container for response header/body pairs.
   class Response {
    public:
     Response();
     ~Response();
 
     SpecialResponseType response_type() const { return response_type_; }
     const SpdyHeaderBlock& headers() const { return headers_; }
-    const StringPiece body() const { return StringPiece(body_); }
+    const base::StringPiece body() const { return base::StringPiece(body_); }
 
     void set_response_type(SpecialResponseType response_type) {
       response_type_ = response_type;
     }
     void set_headers(const SpdyHeaderBlock& headers) {
       headers_ = headers;
     }
     void set_body(base::StringPiece body) {
       body.CopyToString(&body_);
     }
@@ skipping 64 matching lines @@
   // The default response for cache misses, if set.
   scoped_ptr<Response> default_response_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicInMemoryCache);
 };
 
 }  // namespace tools
 }  // namespace net
 
 #endif  // NET_TOOLS_QUIC_QUIC_IN_MEMORY_CACHE_H_