Provide mutable members of UrlRequestContext via pure-virtual interface

net/url_request/static_http_user_agent_settings.cc

Index: net/url_request/static_http_user_agent_settings.cc
diff --git a/net/url_request/static_http_user_agent_settings.cc b/net/url_request/static_http_user_agent_settings.cc
new file mode 100644
index 0000000000000000000000000000000000000000..55dfe9fc7b9495c927b219a416948aa11e374e74
--- /dev/null
+++ b/net/url_request/static_http_user_agent_settings.cc
@@ -0,0 +1,31 @@
+// 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/static_http_user_agent_settings.h"
+
+namespace net {
+
+StaticHttpUserAgentSettings::StaticHttpUserAgentSettings(
+    const std::string& accept_language,
+    const std::string& accept_charset,
+    const std::string& user_agent)
+    : accept_language_(accept_language),
+      accept_charset_(accept_charset),
+      user_agent_(user_agent) {
+}
+
+std::string StaticHttpUserAgentSettings::GetAcceptLanguage() {
+  return accept_language_;
+}
+
+std::string StaticHttpUserAgentSettings::GetAcceptCharset() {
+  return accept_charset_;
+}
+
+std::string StaticHttpUserAgentSettings::GetUserAgent(const GURL& url) {
+  return user_agent_;
+}
+
+}  // namespace net
+