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diff --git a/chrome/browser/google_url_tracker.h b/chrome/browser/google_url_tracker.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.
+
+#include "chrome/browser/url_fetcher.h"
+
+class PrefService;
+
+// This object is responsible for updating the Google URL exactly once (when
+// first constructed) and tracking the currently known value, which is also
+// saved to a pref.
+class GoogleURLTracker : public URLFetcher::Delegate {
+ public:
+  // Only the main browser process loop should call this, when setting up
+  // g_browser_process->google_url_tracker_.  No code other than the
+  // GoogleURLTracker itself should actually use
+  // g_browser_process->google_url_tracker() (which shouldn't be hard, since
+  // there aren't useful public functions on this object for consumers to access
+  // anyway).
+  GoogleURLTracker();
+
+  // This returns the current Google URL.  If this is the first call to it in
+  // this session, it also kicks off a timer to fetch the correct Google URL;
+  // when that fetch completes, it will fire NOTIFY_GOOGLE_URL_UPDATED.
+  //
+  // This is the only function most code should ever call.
+  //
+  // This will return a valid URL even in unittest mode.
+  static GURL GoogleURL();
+
+  static void RegisterPrefs(PrefService* prefs);
+
+ private:
+  FRIEND_TEST(GoogleURLTrackerTest, CheckAndConvertURL);
+
+  // Determines if |url| is an appropriate source for a new Google base URL, and
+  // update |base_url| to the appropriate base URL if so.  Returns whether the
+  // check succeeded (and thus whether |base_url| was actually updated).
+  static bool CheckAndConvertToGoogleBaseURL(const GURL& url, GURL* base_url);
+
+  // Starts the fetch of the up-to-date Google URL.
+  void StartFetch();
+
+  // URLFetcher::Delegate
+  virtual void OnURLFetchComplete(const URLFetcher *source,
+                                  const GURL& url,
+                                  const URLRequestStatus& status,
+                                  int response_code,
+                                  const ResponseCookies& cookies,
+                                  const std::string& data);
+
+  static const char kDefaultGoogleHomepage[];
+
+  GURL google_url_;
+  ScopedRunnableMethodFactory<GoogleURLTracker> fetcher_factory_;
+  scoped_ptr<URLFetcher> fetcher_;
+
+  DISALLOW_EVIL_CONSTRUCTORS(GoogleURLTracker);
+};