Initial implementation of Cronet Async API.

components/cronet/url_request_context_config.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 COMPONENTS_CRONET_URL_REQUEST_CONTEXT_CONFIG_H_
 #define COMPONENTS_CRONET_URL_REQUEST_CONTEXT_CONFIG_H_
 
 #include <string>
 
 #include "base/json/json_value_converter.h"
@@ skipping 44 matching lines @@
   bool enable_quic;
   // Enable SPDY.
   bool enable_spdy;
   // Type of http cache: "HTTP_CACHE_DISABLED", "HTTP_CACHE_DISK" or
   // "HTTP_CACHE_IN_MEMORY".
   std::string http_cache;
   // Max size of http cache in bytes.
   int http_cache_max_size;
   // Storage path for http cache and cookie storage.
   std::string storage_path;
+  // User-Agent request header field.
+  std::string user_agent;
   // App-provided list of servers that support QUIC.
   ScopedVector<QuicHint> quic_hints;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(URLRequestContextConfig);
 };
 
 }  // namespace cronet
 
 #endif  // COMPONENTS_CRONET_URL_REQUEST_CONTEXT_CONFIG_H_