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diff --git a/chrome/browser/net/dns_global.h b/chrome/browser/net/dns_global.h
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+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// This is the global interface for the dns prefetch services.  It centralizes
+// initialization, along with all the callbacks etc. to connect to the browser
+// process.  This allows the more standard DNS prefetching services, such as
+// provided by DnsMaster to be left as more generally usable code, and possibly
+// be shared across multiple client projects.
+
+#ifndef CHROME_BROWSER_NET_DNS_GLOBAL_H__
+#define CHROME_BROWSER_NET_DNS_GLOBAL_H__
+
+#include "chrome/browser/net/dns_master.h"
+
+#include <string>
+
+class PrefService;
+
+namespace chrome_browser_net {
+
+// Functions to initialize our global state so that PrefetchDns() can be called.
+void InitDnsPrefetch(PrefService* user_prefs);
+void ShutdownDnsPrefetch();
+
+// Global API relating to Prefetching in browser
+void EnableDnsPrefetch(bool enable);
+void RegisterPrefs(PrefService* local_state);
+void RegisterUserPrefs(PrefService* user_prefs);
+void DnsPrefetchList(const NameList& hostnames);
+void DnsPrefetchUrlString(const url_canon::UTF16String& url_string);
+void DnsPrefetch(const std::string& hostname);
+void DnsPrefetchGetHtmlInfo(std::string* output);
+
+// Save the hostnames actually used at the start of this session to prefetch
+// during the next startup.
+void SaveHostNamesForNextStartup(PrefService* local_state);
+void DnsPretchHostNamesAtStartup(PrefService* user_prefs,
+                                 PrefService* local_state);
+
+// Helper class to handle global init and shutdown.
+class DnsPrefetcherInit {
+ public:
+  explicit DnsPrefetcherInit(PrefService* user_prefs) {
+    InitDnsPrefetch(user_prefs);
+  }
+  ~DnsPrefetcherInit() {ShutdownDnsPrefetch();}
+
+ private:
+  DISALLOW_EVIL_CONSTRUCTORS(DnsPrefetcherInit);
+};
+
+}  // namespace chrome_browser_net
+
+#endif  // CHROME_BROWSER_NET_DNS_GLOBAL_H__