[Extensions] Convert some ChromeSyncExtensionFunctions

chrome/browser/extensions/api/desktop_capture/desktop_capture_base.cc

 // Copyright 2015 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.
 
 #include "chrome/browser/extensions/api/desktop_capture/desktop_capture_base.h"
 
 #include <tuple>
 #include <utility>
 
 #include "base/command_line.h"
@@ skipping 222 matching lines @@
   return std::tie(process_id, request_id) <
          std::tie(other.process_id, other.request_id);
 }
 
 DesktopCaptureCancelChooseDesktopMediaFunctionBase::
     DesktopCaptureCancelChooseDesktopMediaFunctionBase() {}
 
 DesktopCaptureCancelChooseDesktopMediaFunctionBase::
     ~DesktopCaptureCancelChooseDesktopMediaFunctionBase() {}
 
-bool DesktopCaptureCancelChooseDesktopMediaFunctionBase::RunSync() {
+ExtensionFunction::ResponseAction
+DesktopCaptureCancelChooseDesktopMediaFunctionBase::Run() {
   int request_id;
   EXTENSION_FUNCTION_VALIDATE(args_->GetInteger(0, &request_id));
 
   DesktopCaptureRequestsRegistry::GetInstance()->CancelRequest(
       render_frame_host()->GetProcess()->GetID(), request_id);
-  return true;
+  return RespondNow(NoArguments());
 }
 
 DesktopCaptureRequestsRegistry::DesktopCaptureRequestsRegistry() {}
 DesktopCaptureRequestsRegistry::~DesktopCaptureRequestsRegistry() {}
 
 // static
 DesktopCaptureRequestsRegistry* DesktopCaptureRequestsRegistry::GetInstance() {
   return base::Singleton<DesktopCaptureRequestsRegistry>::get();
 }
 
@@ skipping 12 matching lines @@
 
 void DesktopCaptureRequestsRegistry::CancelRequest(int process_id,
                                                    int request_id) {
   RequestsMap::iterator it = requests_.find(RequestId(process_id, request_id));
   if (it != requests_.end())
     it->second->Cancel();
 }
 
 
 }  // namespace extensions