MD Settings: Add an Import Data BrowserProxy.

chrome/browser/resources/settings/people_page/import_data_browser_proxy.js

+// Copyright 2016 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.
+
+/**
+ * @fileoverview A helper object used from the the Import Data dialog to allow
+ * users to import data (like bookmarks) from other web browsers.
+ */
+cr.exportPath('settings');
+
+/**
+ * An object describing a source browser profile that may be imported.
+ * The structure of this data must be kept in sync with C++ ImportDataHandler.
+ * @typedef {{
+ *   name: string,
+ *   index: number,
+ *   history: boolean,
+ *   favorites: boolean,
+ *   passwords: boolean,
+ *   search: boolean,
+ *   autofillFormData: boolean,
+ * }}
+ */
+settings.BrowserProfile;
+
+/**
+ * @enum {string}
+ * These string values must be kept in sync with the C++ ImportDataHandler.
+ */
+settings.ImportDataStatus = {
+  INITIAL: 'initial',
+  IN_PROGRESS: 'inProgress',
+  SUCCEEDED: 'succeeded',
+  FAILED: 'failed',
+};
+
+cr.define('settings', function() {
+  /** @interface */
+  function ImportDataBrowserProxy() {}
+
+  ImportDataBrowserProxy.prototype = {
+    /**
+     * Returns the source profiles available for importing from other browsers.
+     * @return {!Promise<!Array<!settings.BrowserProfile>>}
+     */
+    initializeImportDialog: function() {},
+
+    /**
+     * Starts importing data for the specificed source browser profile. The C++
+     * responds with the 'import-data-status-changed' WebUIListener event.
+     * @param {number} sourceBrowserProfileIndex
+     */
+    importData: function(sourceBrowserProfileIndex) {},
+
+    /**
+     * Prompts the user to choose a bookmarks file to import bookmarks from.
+     */
+    importFromBookmarksFile: function() {},
+  };
+
+  /**
+   * @constructor
+   * @implements {settings.ImportDataBrowserProxy}
+   */
+  function ImportDataBrowserProxyImpl() {}
+  // The singleton instance_ is replaced with a test version of this wrapper
+  // during testing.
+  cr.addSingletonGetter(ImportDataBrowserProxyImpl);
+
+  ImportDataBrowserProxyImpl.prototype = {
+    /** @override */
+    initializeImportDialog: function() {
+      return cr.sendWithPromise('initializeImportDialog');
+    },
+
+    /** @override */
+    importData: function(sourceBrowserProfileIndex) {
+      chrome.send('importData', [sourceBrowserProfileIndex]);
+    },
+
+    /** @override */
+    importFromBookmarksFile: function() {
+      chrome.send('importFromBookmarksFile');
+    },
+  };
+
+  return {
+    ImportDataBrowserProxy: ImportDataBrowserProxy,
+    ImportDataBrowserProxyImpl: ImportDataBrowserProxyImpl,
+  };
+});