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

net/spdy/hpack/hpack_output_stream.h

 // Copyright 2014 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_HPACK_HPACK_OUTPUT_STREAM_H_
 #define NET_SPDY_HPACK_HPACK_OUTPUT_STREAM_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <map>
-#include <string>
 
 #include "base/macros.h"
 #include "net/base/net_export.h"
 #include "net/spdy/hpack/hpack_constants.h"
+#include "net/spdy/platform/api/spdy_string.h"
 #include "net/spdy/platform/api/spdy_string_piece.h"
 
 // All section references below are to
 // http://tools.ietf.org/html/draft-ietf-httpbis-header-compression-08
 
 namespace net {
 
 // An HpackOutputStream handles all the low-level details of encoding
 // header fields.
 class NET_EXPORT_PRIVATE HpackOutputStream {
@@ skipping 16 matching lines @@
   // Appends the given integer using the representation described in
   // 6.1. If the internal buffer ends on a byte boundary, the prefix
   // length N is taken to be 8; otherwise, it is taken to be the
   // number of bits to the next byte boundary.
   //
   // It is guaranteed that the internal buffer will end on a byte
   // boundary after this function is called.
   void AppendUint32(uint32_t I);
 
   // Swaps the internal buffer with |output|, then resets state.
-  void TakeString(std::string* output);
+  void TakeString(SpdyString* output);
 
   // Gives up to |max_size| bytes of the internal buffer to |output|. Resets
   // internal state with the overflow.
-  void BoundedTakeString(size_t max_size, std::string* output);
+  void BoundedTakeString(size_t max_size, SpdyString* output);
 
   // Size in bytes of stream's internal buffer.
   size_t size() const { return buffer_.size(); }
 
   // Returns the estimate of dynamically allocated memory in bytes.
   size_t EstimateMemoryUsage() const;
 
  private:
   // The internal bit buffer.
-  std::string buffer_;
+  SpdyString buffer_;
 
   // If 0, the buffer ends on a byte boundary. If non-zero, the buffer
   // ends on the nth most significant bit. Guaranteed to be < 8.
   size_t bit_offset_;
 
   DISALLOW_COPY_AND_ASSIGN(HpackOutputStream);
 };
 
 }  // namespace net
 
 #endif  // NET_SPDY_HPACK_HPACK_OUTPUT_STREAM_H_