Add SpdyString alias for std::string in net/spdy.

net/spdy/spdy_stream_test_util.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_SPDY_SPDY_STREAM_TEST_UTIL_H_
 #define NET_SPDY_SPDY_STREAM_TEST_UTIL_H_
 
 #include <memory>
 
 #include "base/compiler_specific.h"
@@ skipping 46 matching lines @@
   void OnTrailers(const SpdyHeaderBlock& trailers) override;
   void OnClose(int status) override;
   NetLogSource source_dependency() const override;
 
   // Waits for the stream to be closed and returns the status passed
   // to OnClose().
   int WaitForClose();
 
   // Drains all data from the underlying read queue and returns it as
   // a string.
-  std::string TakeReceivedData();
+  SpdyString TakeReceivedData();
 
   // Returns whether or not the stream is closed.
   bool StreamIsClosed() const { return !stream_.get(); }
 
   // Returns the stream's ID. If called when the stream is closed,
   // returns the stream's ID when it was open.
   SpdyStreamId stream_id() const { return stream_id_; }
 
-  std::string GetResponseHeaderValue(const std::string& name) const;
+  SpdyString GetResponseHeaderValue(const SpdyString& name) const;
   bool send_headers_completed() const { return send_headers_completed_; }
 
  protected:
   const base::WeakPtr<SpdyStream>& stream() { return stream_; }
 
  private:
   base::WeakPtr<SpdyStream> stream_;
   SpdyStreamId stream_id_;
   TestCompletionCallback callback_;
   bool send_headers_completed_;
@@ skipping 44 matching lines @@
   ~StreamDelegateCloseOnHeaders() override;
 
   void OnHeadersReceived(const SpdyHeaderBlock& response_headers) override;
 };
 
 } // namespace test
 
 } // namespace net
 
 #endif // NET_SPDY_SPDY_STREAM_TEST_UTIL_H_