Provide mutable members of UrlRequestContext via pure-virtual interface

net/url_request/const_http_user_agent_settings.cc

Index: net/url_request/const_http_user_agent_settings.cc
diff --git a/net/url_request/const_http_user_agent_settings.cc b/net/url_request/const_http_user_agent_settings.cc
new file mode 100644
index 0000000000000000000000000000000000000000..54cb80201e5f131a3c3421cdb70af75b8c7c5561
--- /dev/null
+++ b/net/url_request/const_http_user_agent_settings.cc
@@ -0,0 +1,21 @@
+// 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_user_agent_settings.h"
+
+namespace net {
+
+ConstHttpUserAgentSettings::ConstHttpUserAgentSettings(
+  const std::string& accept_language, const std::string& accept_charset,

[erikwright (departed), 2012/09/25 21:06:38]

wrap accept_charset

+  const std::string& user_agent)
+    : ConstHttpAcceptLanguageAndCharset(accept_language, accept_charset),
+      user_agent_(user_agent) {
+}
+
+const std::string& ConstHttpUserAgentSettings::GetUserAgent(const GURL& url) {
+  return user_agent_;
+}
+
+}  // namespace net
+