[Extensions] Convert some SyncExtensionFunctions

chrome/browser/extensions/api/idltest/idltest_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_IDLTEST_IDLTEST_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_IDLTEST_IDLTEST_API_H_
 
 #include "extensions/browser/extension_function.h"
 
-class IdltestSendArrayBufferFunction : public SyncExtensionFunction {
+class IdltestSendArrayBufferFunction : public UIThreadExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("idltest.sendArrayBuffer", IDLTEST_SENDARRAYBUFFER)
 
  protected:
   ~IdltestSendArrayBufferFunction() override {}
-  bool RunSync() override;
+  ResponseAction Run() override;
 };
 
-class IdltestSendArrayBufferViewFunction : public SyncExtensionFunction {
+class IdltestSendArrayBufferViewFunction : public UIThreadExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("idltest.sendArrayBufferView",
                              IDLTEST_SENDARRAYBUFFERVIEW)
 
  protected:
   ~IdltestSendArrayBufferViewFunction() override {}
-  bool RunSync() override;
+  ResponseAction Run() override;
 };
 
-class IdltestGetArrayBufferFunction : public SyncExtensionFunction {
+class IdltestGetArrayBufferFunction : public UIThreadExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("idltest.getArrayBuffer", IDLTEST_GETARRAYBUFFER)
 
  protected:
   ~IdltestGetArrayBufferFunction() override {}
-  bool RunSync() override;
+  ResponseAction Run() override;
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_IDLTEST_IDLTEST_API_H_