Gallery: capture escape key in full screen by adding a permission.

ui/file_manager/gallery/js/slide_mode.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.
 
 /**
  * Slide mode displays a single image and has a set of controls to navigate
  * between the images and to edit an image.
  *
  * @param {!HTMLElement} container Main container element.
  * @param {!HTMLElement} content Content container element.
@@ skipping 185 matching lines @@
    * @private
    */
   this.slideShowTimeout_ = null;
 
   /**
    * @type {?number}
    * @private
    */
   this.spinnerTimer_ = null;
 
-  this.context_.appWindow.onRestored.addListener(this.onRestored_.bind(this));
   window.addEventListener('resize', this.onResize_.bind(this));
 
   // ----------------------------------------------------------------
   // Initializes the UI.
 
   /**
    * Container for displayed image.
    * @type {!HTMLElement}
    * @private
    * @const
@@ skipping 885 matching lines @@
  * Keydown handler.
  *
  * @param {!Event} event Event.
  * @return {boolean} True if handled.
  */
 SlideMode.prototype.onKeyDown = function(event) {
   var keyID = util.getKeyModifiers(event) + event.keyIdentifier;
 
   if (this.isSlideshowOn_()) {
     switch (keyID) {
-      // Escape key is captured by the platform to exit full screen. We handle
-      // it by onRestored event.
-
+      case 'U+001B':  // Escape
       case 'MediaStop':
         this.stopSlideshow_(event);
         break;
 
       case 'U+0020':  // Space pauses/resumes the slideshow.
       case 'MediaPlayPause':
         this.toggleSlideshowPause_();
         break;
 
       case 'Up':
@@ skipping 84 matching lines @@
         this.touchHandlers_.stopOperation();
         this.imageView_.applyViewportChange();
       }
       break;
   }
 
   return true;
 };
 
 /**
- * Restored event handler.
- * @private
- */
-SlideMode.prototype.onRestored_ = function() {
-  // Leave slide show since the window should not be in full screen when
-  // onRestored event is dispatched.
-  if (this.isSlideshowOn_())
-    this.stopSlideshow_();
-};
-
-/**
  * Resize handler.
  * @private
  */
 SlideMode.prototype.onResize_ = function() {
   this.viewport_.setScreenSize(
       this.container_.clientWidth, this.container_.clientHeight);
   this.touchHandlers_.stopOperation();
   this.editor_.getBuffer().draw();
 };
 
@@ skipping 625 matching lines @@
   var event = assertInstanceof(event, MouseEvent);
   var viewport = this.slideMode_.getViewport();
   if (!this.enabled_ || !viewport.isZoomed())
     return;
   this.stopOperation();
   viewport.setOffset(
       viewport.getOffsetX() + event.wheelDeltaX,
       viewport.getOffsetY() + event.wheelDeltaY);
   this.slideMode_.applyViewportChange();
 };