Revert "Implement a JavaScript API for document scanning"

chrome/browser/extensions/api/document_scan/document_scan_api.h

-// 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 <string>
-#include <vector>
-
-#include "base/memory/scoped_ptr.h"
-#include "chrome/browser/extensions/api/document_scan/document_scan_interface.h"
-#include "chrome/common/extensions/api/document_scan.h"
-#include "extensions/browser/api/async_api_function.h"
-
-#ifndef CHROME_BROWSER_EXTENSIONS_API_DOCUMENT_SCAN_DOCUMENT_SCAN_FUNCTION_H_
-#define CHROME_BROWSER_EXTENSIONS_API_DOCUMENT_SCAN_DOCUMENT_SCAN_FUNCTION_H_
-
-namespace extensions {
-
-namespace api {
-
-class DocumentScanScanFunction : public AsyncApiFunction {
- public:
-  DECLARE_EXTENSION_FUNCTION("documentScan.scan",
-                             DOCUMENT_SCAN_SCAN)
-  DocumentScanScanFunction();
-
- protected:
-  ~DocumentScanScanFunction();
-
-  // AsyncApiFunction:
-  virtual bool Prepare() override;
-  virtual void AsyncWorkStart() override;
-  virtual bool Respond() override;
-
- private:
-  friend class DocumentScanScanFunctionTest;
-
-  void OnScannerListReceived(
-      const std::vector<DocumentScanInterface::ScannerDescription>&
-          scanner_descriptions,
-      const std::string& error);
-  void OnResultsReceived(const std::string& scanned_image,
-                         const std::string& mime_type,
-                         const std::string& error);
-
-  scoped_ptr<document_scan::Scan::Params> params_;
-  scoped_ptr<DocumentScanInterface> document_scan_interface_;
-
-  DISALLOW_COPY_AND_ASSIGN(DocumentScanScanFunction);
-};
-
-}  // namespace api
-
-}  // namespace extensions
-
-#endif  // CHROME_BROWSER_EXTENSIONS_API_DOCUMENT_SCAN_DOCUMENT_SCAN_FUNCTION_H_