(WIP) Use generator to generate externs for chrome.fileManagerPrivate API.

ui/file_manager/audio_player/js/audio_player.js

 // Copyright (c) 2012 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.
 
 /**
  * Overrided metadata worker's path.
  * @type {string}
  */
 ContentMetadataProvider.WORKER_SCRIPT = '/js/metadata_worker.js';
 
@@ skipping 352 matching lines @@
  * @private
  */
 AudioPlayer.prototype.onKeyDown_ = function(event) {
   switch (util.getKeyModifiers(event) + event.key) {
     case 'Ctrl-w': // Ctrl+W => Close the player.
       chrome.app.window.current().close();
       break;
 
     // Handle debug shortcut keys.
     case 'Ctrl-Shift-I': // Ctrl+Shift+I
-      chrome.fileManagerPrivate.openInspector('normal');
+      chrome.fileManagerPrivate.openInspector(
+          chrome.fileManagerPrivate.InspectionType.NORMAL);
       break;
     case 'Ctrl-Shift-J': // Ctrl+Shift+J
-      chrome.fileManagerPrivate.openInspector('console');
+      chrome.fileManagerPrivate.openInspector(
+          chrome.fileManagerPrivate.InspectionType.CONSOLE);
       break;
     case 'Ctrl-Shift-C': // Ctrl+Shift+C
-      chrome.fileManagerPrivate.openInspector('element');
+      chrome.fileManagerPrivate.openInspector(
+          chrome.fileManagerPrivate.InspectionType.ELEMENT);
       break;
     case 'Ctrl-Shift-B': // Ctrl+Shift+B
-      chrome.fileManagerPrivate.openInspector('background');
+      chrome.fileManagerPrivate.openInspector(
+          chrome.fileManagerPrivate.InspectionType.BACKGROUND);
       break;
 
     case ' ': // Space
     case 'k':
       this.player_.dispatchEvent(new Event('toggle-pause-event'));
       break;
     case 'ArrowUp':
     case 'ArrowRight':
       if (event.target.id !== 'volumeSlider')
         this.player_.dispatchEvent(new Event('small-forward-skip-event'));
@@ skipping 228 matching lines @@
   // TODO(yoshiki): Handle error in better way.
   this.title = metadata.mediaTitle || this.getDefaultTitle();
   this.artist = error || metadata.mediaArtist || this.getDefaultArtist();
   this.artworkUrl = metadata.contentThumbnailUrl || "";
 };
 
 // Starts loading the audio player.
 window.addEventListener('DOMContentLoaded', function(e) {
   AudioPlayer.load();
 });