[Extensions] Convert some ChromeSyncExtensionFunctions

chrome/browser/extensions/api/preference/preference_api.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_EXTENSIONS_API_PREFERENCE_PREFERENCE_API_H__
 #define CHROME_BROWSER_EXTENSIONS_API_PREFERENCE_PREFERENCE_API_H__
 
 #include <string>
 
 #include "base/macros.h"
@@ skipping 148 matching lines @@
   // Converts the representation of the preference as stored in the browser
   // into a representation that is used by the extension.
   // Returns the extension representation in case of success or NULL otherwise.
   // The ownership of the returned value is passed to the caller.
   virtual base::Value* BrowserToExtensionPref(
       const base::Value* browser_pref) = 0;
 };
 
 // A base class to provide functionality common to the other *PreferenceFunction
 // classes.
-class PreferenceFunction : public ChromeSyncExtensionFunction {
+class PreferenceFunction : public UIThreadExtensionFunction {
  protected:
   enum PermissionType { PERMISSION_TYPE_READ, PERMISSION_TYPE_WRITE };
 
   ~PreferenceFunction() override;
-
-  // Given an |extension_pref_key|, provides its |browser_pref_key| from the
-  // static map in preference_api.cc. Returns true if the corresponding
-  // browser pref exists and the extension has the API permission needed to
-  // modify that pref. Sets |error_| if the extension doesn't have the needed
-  // permission.
-  bool ValidateBrowserPref(const std::string& extension_pref_key,
-                           PermissionType permission_type,
-                           std::string* browser_pref_key);
 };
 
 class GetPreferenceFunction : public PreferenceFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("types.ChromeSetting.get", TYPES_CHROMESETTING_GET)
 
  protected:
   ~GetPreferenceFunction() override;
 
   // ExtensionFunction:
-  bool RunSync() override;
+  ResponseAction Run() override;
 };
 
 class SetPreferenceFunction : public PreferenceFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("types.ChromeSetting.set", TYPES_CHROMESETTING_SET)
 
  protected:
   ~SetPreferenceFunction() override;
 
   // ExtensionFunction:
-  bool RunSync() override;
+  ResponseAction Run() override;
 };
 
 class ClearPreferenceFunction : public PreferenceFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("types.ChromeSetting.clear",
                              TYPES_CHROMESETTING_CLEAR)
 
  protected:
   ~ClearPreferenceFunction() override;
 
   // ExtensionFunction:
-  bool RunSync() override;
+  ResponseAction Run() override;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_PREFERENCE_PREFERENCE_API_H__