Extract PrefServiceBase into chrome/browser/api. Use in api and autofill.

chrome/browser/autofill/autofill_manager.h

 // 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.
 
 #ifndef CHROME_BROWSER_AUTOFILL_AUTOFILL_MANAGER_H_
 #define CHROME_BROWSER_AUTOFILL_AUTOFILL_MANAGER_H_
 
 #include <list>
 #include <map>
 #include <string>
@@ skipping 58 matching lines @@
 // forms.
 class AutofillManager : public content::NotificationObserver,
                         public content::WebContentsObserver,
                         public AutofillDownloadManager::Observer,
                         public ProfileSyncServiceObserver,
                         public base::RefCounted<AutofillManager> {
  public:
   explicit AutofillManager(TabContents* tab_contents);
 
   // Registers our Enable/Disable Autofill pref.
-  static void RegisterUserPrefs(PrefService* prefs);
+  static void RegisterUserPrefs(PrefServiceBase* prefs);
 
   // Set our external delegate.
   // TODO(jrg): consider passing delegate into the ctor.  That won't
   // work if the delegate has a pointer to the AutofillManager, but
   // future directions may not need such a pointer.
   void SetExternalDelegate(AutofillExternalDelegate* delegate) {
     external_delegate_ = delegate;
   }
 
   // Used to say if this class has an external delegate that it is using.
@@ skipping 313 matching lines @@
                            TestTabContentsWithExternalDelegate);
   FRIEND_TEST_ALL_PREFIXES(AutofillMetricsTest,
                            UserHappinessFormLoadAndSubmission);
   FRIEND_TEST_ALL_PREFIXES(AutofillMetricsTest, UserHappinessFormInteraction);
   FRIEND_TEST_ALL_PREFIXES(AutofillMetricsTest, FormFillDuration);
 
   DISALLOW_COPY_AND_ASSIGN(AutofillManager);
 };
 
 #endif  // CHROME_BROWSER_AUTOFILL_AUTOFILL_MANAGER_H_