Get rid of the link time dependency between content and chrome through the geolocation code.

chrome/browser/geolocation/chrome_access_token_store.h

+// Copyright (c) 2011 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_GEOLOCATION_CHROME_ACCESS_TOKEN_STORE_H_
+#define CHROME_BROWSER_GEOLOCATION_CHROME_ACCESS_TOKEN_STORE_H_
+#pragma once
+
+#include "base/memory/ref_counted.h"
+#include "content/browser/geolocation/access_token_store.h"
+
+class PrefService;
+
+// Creates a new access token store backed by the global chome prefs.
+class ChromeAccessTokenStore : public AccessTokenStore {
+ public:
+  static void RegisterPrefs(PrefService* prefs);
+
+  ChromeAccessTokenStore();
+
+ private:
+  void LoadDictionaryStoreInUIThread(
+      scoped_refptr<CancelableRequest<LoadAccessTokensCallbackType> > request);
+
+  // AccessTokenStore
+  virtual void DoLoadAccessTokens(
+      scoped_refptr<CancelableRequest<LoadAccessTokensCallbackType> > request);
+  virtual void SaveAccessToken(
+      const GURL& server_url, const string16& access_token);
+
+  DISALLOW_COPY_AND_ASSIGN(ChromeAccessTokenStore);
+};
+
+#endif  // CHROME_BROWSER_GEOLOCATION_CHROME_ACCESS_TOKEN_STORE_H_