Add QuicStrCat.

net/tools/quic/quic_http_response_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_HTTP_RESPONSE_CACHE_H_
 #define NET_TOOLS_QUIC_QUIC_HTTP_RESPONSE_CACHE_H_
 
 #include <list>
 #include <map>
 #include <memory>
 #include <string>
 #include <unordered_map>
 #include <vector>
 
 #include "base/files/file_path.h"
 #include "base/macros.h"
 #include "base/strings/string_piece.h"
 #include "net/http/http_response_headers.h"
 #include "net/quic/core/spdy_utils.h"
 #include "net/quic/platform/api/quic_mutex.h"
+#include "net/quic/platform/api/quic_str_cat.h"

[Ryan Hamilton, 2016/12/22 18:17:30]

nit: is this required?

 #include "net/spdy/spdy_framer.h"
 #include "url/gurl.h"
 
 namespace net {
 
 // In-memory cache for HTTP responses.
 // Reads from disk cache generated by:
 // `wget -p --save_headers <url>`
 class QuicHttpResponseCache {
  public:
@@ skipping 184 matching lines @@
   // Protects against concurrent access from test threads setting responses, and
   // server threads accessing those responses.
   mutable QuicMutex response_mutex_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicHttpResponseCache);
 };
 
 }  // namespace net
 
 #endif  // NET_TOOLS_QUIC_QUIC_HTTP_RESPONSE_CACHE_H_