Revert "Implement a JavaScript API for document scanning"

chrome/browser/extensions/api/document_scan/document_scan_interface.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/callback.h"
-#include "base/memory/scoped_ptr.h"
-
-#ifndef CHROME_BROWSER_EXTENSIONS_API_DOCUMENT_SCAN_DOCUMENT_SCAN_INTERFACE_H_
-#define CHROME_BROWSER_EXTENSIONS_API_DOCUMENT_SCAN_DOCUMENT_SCAN_INTERFACE_H_
-
-namespace extensions {
-
-namespace api {
-
-class DocumentScanInterface {
- public:
-  struct ScannerDescription {
-    ScannerDescription();
-    ~ScannerDescription();
-    std::string name;
-    std::string manufacturer;
-    std::string model;
-    std::string scanner_type;
-    std::string image_mime_type;
-  };
-
-  enum ScanMode {
-    kScanModeColor,
-    kScanModeGray,
-    kScanModeLineart
-  };
-
-  typedef base::Callback<void(
-      const std::vector<ScannerDescription>& scanner_descriptions,
-      const std::string& error)> ListScannersResultsCallback;
-
-  typedef base::Callback<void(
-      const std::string& scanned_image,
-      const std::string& mime_type,
-      const std::string& error)> ScanResultsCallback;
-
-  virtual ~DocumentScanInterface();
-
-  virtual void Scan(const std::string& scanner_name,
-                    ScanMode mode,
-                    int resolution_dpi,
-                    const ScanResultsCallback& callback) = 0;
-  virtual void ListScanners(const ListScannersResultsCallback& callback) = 0;
-
-  // Creates a platform-specific DocumentScanInterface instance.
-  static DocumentScanInterface *CreateInstance();
-
- protected:
-  DocumentScanInterface();
-};
-
-}  // namespace api
-
-}  // namespace extensions
-
-#endif  // CHROME_BROWSER_EXTENSIONS_API_DOCUMENT_SCAN_DOCUMENT_SCAN_INTERFACE_H_