[Extensions] Convert some SyncExtensionFunctions

chrome/browser/extensions/api/system_private/system_private_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.
 
 // This extension API contains system-wide preferences and functions that shall
 // be only available to component extensions.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_SYSTEM_PRIVATE_SYSTEM_PRIVATE_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_SYSTEM_PRIVATE_SYSTEM_PRIVATE_API_H_
 
-#include "chrome/browser/extensions/chrome_extension_function.h"
+#include "extensions/browser/extension_function.h"
 
 namespace extensions {
 
 class SystemPrivateGetIncognitoModeAvailabilityFunction
-    : public ChromeSyncExtensionFunction {
+    : public UIThreadExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("systemPrivate.getIncognitoModeAvailability",
                              SYSTEMPRIVATE_GETINCOGNITOMODEAVAILABILITY)
 
  protected:
   ~SystemPrivateGetIncognitoModeAvailabilityFunction() override {}
 
   // ExtensionFunction:
-  bool RunSync() override;
+  ResponseAction Run() override;
 };
 
 // API function which returns the status of system update.
-class SystemPrivateGetUpdateStatusFunction
-    : public ChromeSyncExtensionFunction {
+class SystemPrivateGetUpdateStatusFunction : public UIThreadExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("systemPrivate.getUpdateStatus",
                              SYSTEMPRIVATE_GETUPDATESTATUS)
 
  protected:
   ~SystemPrivateGetUpdateStatusFunction() override {}
 
   // ExtensionFunction:
-  bool RunSync() override;
+  ResponseAction Run() override;
 };
 
 // API function which returns the Google API key.
-class SystemPrivateGetApiKeyFunction : public SyncExtensionFunction {
+class SystemPrivateGetApiKeyFunction : public UIThreadExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("systemPrivate.getApiKey", SYSTEMPRIVATE_GETAPIKEY)
 
  protected:
   ~SystemPrivateGetApiKeyFunction() override {}
 
   // ExtensionFunction:
-  bool RunSync() override;
+  ResponseAction Run() override;
 };
 
 // Dispatches systemPrivate.onBrightnessChanged event for extensions.
 void DispatchBrightnessChangedEvent(int brightness, bool user_initiated);
 
 // Dispatches systemPrivate.onVolumeChanged event for extensions.
 void DispatchVolumeChangedEvent(double volume, bool is_volume_muted);
 
 // Dispatches systemPrivate.onScreenChanged event for extensions.
 void DispatchScreenUnlockedEvent();
 
 // Dispatches systemPrivate.onWokeUp event for extensions.
 void DispatchWokeUpEvent();
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_SYSTEM_PRIVATE_SYSTEM_PRIVATE_API_H_