|  | // 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 "base/macros.h" | 
|  | #include "extensions/browser/api/document_scan/document_scan_interface.h" | 
|  |  | 
|  | namespace { | 
|  |  | 
|  | const char kScanFunctionNotImplementedError[] = "Scan function not implemented"; | 
|  |  | 
|  | }  // namespace | 
|  |  | 
|  | namespace extensions { | 
|  |  | 
|  | namespace api { | 
|  |  | 
|  | class DocumentScanInterfaceImpl : public DocumentScanInterface { | 
|  | public: | 
|  | DocumentScanInterfaceImpl() {} | 
|  | ~DocumentScanInterfaceImpl() override {} | 
|  |  | 
|  | void ListScanners(const ListScannersResultsCallback& callback) override { | 
|  | callback.Run(std::vector<ScannerDescription>(), ""); | 
|  | } | 
|  | void Scan(const std::string& scanner_name, | 
|  | ScanMode mode, | 
|  | int resolution_dpi, | 
|  | const ScanResultsCallback& callback) override { | 
|  | callback.Run("", "", kScanFunctionNotImplementedError); | 
|  | } | 
|  |  | 
|  | private: | 
|  | DISALLOW_COPY_AND_ASSIGN(DocumentScanInterfaceImpl); | 
|  | }; | 
|  |  | 
|  | // static | 
|  | DocumentScanInterface* DocumentScanInterface::CreateInstance() { | 
|  | return new DocumentScanInterfaceImpl(); | 
|  | } | 
|  |  | 
|  | }  // namespace api | 
|  |  | 
|  | }  // namespace extensions |