Provide mutable members of UrlRequestContext via pure-virtual interface

chrome/browser/net/basic_http_user_agent_settings.cc

+// 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 "chrome/browser/net/basic_http_user_agent_settings.h"
+
+#include "content/public/common/content_client.h"
+
+BasicHttpUserAgentSettings::BasicHttpUserAgentSettings(
+    const std::string& accept_language, const std::string& accept_charset)
+    : accept_language_(accept_language),
+      accept_charset_(accept_charset) {}
+
+std::string BasicHttpUserAgentSettings::GetAcceptLanguage() {
+  return accept_language_;
+}
+
+std::string BasicHttpUserAgentSettings::GetAcceptCharset() {
+  return accept_charset_;
+}
+
+std::string BasicHttpUserAgentSettings::GetUserAgent(const GURL& url) {
+  return content::GetUserAgent(url);
+}
+