Compile several targets in Gallery in gyp v2.

ui/file_manager/gallery/js/image_editor/image_editor.js

 // 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.
 
 /**
  * ImageEditor is the top level object that holds together and connects
  * everything needed for image editing.
  *
  * @param {!Viewport} viewport The viewport.
  * @param {!ImageView} imageView The ImageView containing the images to edit.
@@ skipping 164 matching lines @@
  */
 ImageEditor.prototype.lockUI = function(on) {
   ImageUtil.setAttribute(this.rootContainer_, 'locked', on);
 };
 
 /**
  * Report the tool use to the metrics subsystem.
  * @param {string} name Action name.
  */
 ImageEditor.prototype.recordToolUse = function(name) {
-  ImageUtil.metrics.recordEnum(
+  metrics.recordEnum(
       ImageUtil.getMetricName('Tool'), name, this.actionNames_);
 };
 
 /**
  * Content update handler.
  * @private
  */
 ImageEditor.prototype.calculateModeApplicativity_ = function() {
   for (var i = 0; i != this.modes_.length; i++) {
     var mode = this.modes_[i];
@@ skipping 1408 matching lines @@
 
 /**
  * Hide the prompt.
  */
 ImageEditor.Prompt.prototype.hide = function() {
   if (!this.prompt_) return;
   this.prompt_.setAttribute('state', 'fadeout');
   // Allow some time for the animation to play out.
   this.setTimer(this.reset.bind(this), 500);
 };