Move chrome.documentScan API to extensions/

chrome/common/extensions/api/document_scan.idl

-// 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.
-
-// Use the <code>chrome.documentScan</code> API to discover and retrieve
-// images from attached paper document scanners.
-namespace documentScan {
-  dictionary ScanOptions {
-    // The MIME types that are accepted by the caller.
-    DOMString[]? mimeTypes;
-
-    // The number of scanned images allowed (defaults to 1).
-    long? maxImages;
-  };
-
-  dictionary ScanResults {
-    // The data image URLs in a form that can be passed as the "src" value to
-    // an image tag.
-    DOMString[] dataUrls;
-
-    // The MIME type of <code>dataUrls</code>.
-    DOMString mimeType;
-  };
-
-  // Callback from the <code>scan</code> method.
-  // |result| The results from the scan, if successful.
-  // Otherwise will return null and set runtime.lastError.
-  callback ScanCallback = void (ScanResults result);
-
-  interface Functions {
-    // Performs a document scan.  On success, the PNG data will be
-    // sent to the callback.
-    // |options| : Object containing scan parameters.
-    // |callback| : Called with the result and data from the scan.
-    static void scan(ScanOptions options, ScanCallback callback);
-  };
-};