Provide mutable members of UrlRequestContext via pure-virtual interface

net/url_request/const_http_accept_language_and_charset.cc

Index: net/url_request/const_http_accept_language_and_charset.cc
diff --git a/net/url_request/const_http_accept_language_and_charset.cc b/net/url_request/const_http_accept_language_and_charset.cc
new file mode 100644
index 0000000000000000000000000000000000000000..fdaa909d855aec05db4c2126f990f057c8513661
--- /dev/null
+++ b/net/url_request/const_http_accept_language_and_charset.cc
@@ -0,0 +1,24 @@
+// 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.
+
+#include "net/url_request/const_http_accept_language_and_charset.h"
+
+namespace net {
+
+ConstHttpAcceptLanguageAndCharset::ConstHttpAcceptLanguageAndCharset(
+    const std::string& accept_language, const std::string& accept_charset)
+    : accept_language_(accept_language),
+      accept_charset_(accept_charset) {
+}
+
+std::string ConstHttpAcceptLanguageAndCharset::GetAcceptLanguage() {
+  return accept_language_;
+}
+
+std::string ConstHttpAcceptLanguageAndCharset::GetAcceptCharset() {
+  return accept_charset_;
+}
+
+}  // namespace net
+