[Extensions] Convert some ChromeSyncExtensionFunctions

chrome/browser/chromeos/extensions/file_system_provider/provider_function.cc

 // Copyright 2014 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 <utility>
 
 #include "chrome/browser/chromeos/extensions/file_system_provider/file_system_provider_api.h"
 #include "chrome/browser/chromeos/file_system_provider/provided_file_system_interface.h"
 #include "chrome/browser/chromeos/file_system_provider/request_manager.h"
 #include "chrome/browser/chromeos/file_system_provider/request_value.h"
@@ skipping 106 matching lines @@
 
 std::string FileErrorToString(base::File::Error error) {
   return extensions::api::file_system_provider::ToString(
       FileErrorToProviderError(error));
 }
 
 FileSystemProviderInternalFunction::FileSystemProviderInternalFunction()
     : request_id_(0), request_manager_(NULL) {
 }
 
-bool FileSystemProviderInternalFunction::RejectRequest(
+ExtensionFunction::ResponseAction
+FileSystemProviderInternalFunction::RejectRequest(
     std::unique_ptr<chromeos::file_system_provider::RequestValue> value,
     base::File::Error error) {
   const base::File::Error result =
       request_manager_->RejectRequest(request_id_, std::move(value), error);
-  if (result != base::File::FILE_OK) {
-    SetError(FileErrorToString(result));
-    return false;
-  }
-
-  return true;
+  if (result != base::File::FILE_OK)
+    return RespondNow(Error(FileErrorToString(result)));
+  return RespondNow(NoArguments());
 }
 
-bool FileSystemProviderInternalFunction::FulfillRequest(
+ExtensionFunction::ResponseAction
+FileSystemProviderInternalFunction::FulfillRequest(
     std::unique_ptr<RequestValue> value,
     bool has_more) {
   const base::File::Error result =
       request_manager_->FulfillRequest(request_id_, std::move(value), has_more);
-  if (result != base::File::FILE_OK) {
-    SetError(FileErrorToString(result));
-    return false;
-  }
-
-  return true;
+  if (result != base::File::FILE_OK)
+    return RespondNow(Error(FileErrorToString(result)));
+  return RespondNow(NoArguments());
 }
 
-bool FileSystemProviderInternalFunction::RunSync() {
-  DCHECK(args_);
-  if (!Parse())
-    return false;
-
-  return RunWhenValid();
-}
-
-bool FileSystemProviderInternalFunction::Parse() {
+bool FileSystemProviderInternalFunction::PreRunValidation(std::string* error) {
   std::string file_system_id;
 
-  if (!args_->GetString(0, &file_system_id) ||
-      !args_->GetInteger(1, &request_id_)) {
-    set_bad_message(true);
-    return false;
-  }
+  EXTENSION_FUNCTION_PRERUN_VALIDATE(args_->GetString(0, &file_system_id));
+  EXTENSION_FUNCTION_PRERUN_VALIDATE(args_->GetInteger(1, &request_id_));
 
-  Service* service = Service::Get(GetProfile());
+  Service* service = Service::Get(browser_context());
   if (!service) {
+    *error = "File system provider service not found.";
     return false;
   }
 
   ProvidedFileSystemInterface* file_system =
       service->GetProvidedFileSystem(extension_id(), file_system_id);
   if (!file_system) {
-    SetError(FileErrorToString(base::File::FILE_ERROR_NOT_FOUND));
+    *error = FileErrorToString(base::File::FILE_ERROR_NOT_FOUND);
     return false;
   }
 
   request_manager_ = file_system->GetRequestManager();
   return true;
 }
 
 }  // namespace extensions