Wrapped data reduction proxy initialization into its own class

chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_io_data.h

+// Copyright 2015 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 CHROME_BROWSER_NET_SPDYPROXY_DATA_REDUCTION_PROXY_CHROME_IO_DATA_H_
+#define CHROME_BROWSER_NET_SPDYPROXY_DATA_REDUCTION_PROXY_CHROME_IO_DATA_H_
+
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+
+class DataReductionProxyChromeConfigurator;
+class PrefService;
+
+namespace base {
+class SingleThreadTaskRunner;
+}
+
+namespace content {
+class BrowserContext;
+}
+
+namespace data_reduction_proxy {
+class DataReductionProxyConfigurator;
+class DataReductionProxyIOData;
+class DataReductionProxySettings;
+}
+
+namespace net {
+class NetLog;
+}
+
+// Constructs DataReductionProxyIOData suitable for use by ProfileImpl and
+// ProfileImplIOData.
+scoped_ptr<data_reduction_proxy::DataReductionProxyIOData>
+CreateDataReductionProxyChromeIOData(
+    net::NetLog* net_log,
+    content::BrowserContext* browser_context,
+    PrefService* prefs,
+    const scoped_refptr<base::SingleThreadTaskRunner>& io_thread_runner,
+    const scoped_refptr<base::SingleThreadTaskRunner>& ui_thread_runner);
+
+#endif  // CHROME_BROWSER_NET_SPDYPROXY_DATA_REDUCTION_PROXY_CHROME_IO_DATA_H_