Revert of Leave fullscreen mode in an app window when ESC key is pressed.

chrome/test/data/extensions/platform_apps/prevent_leave_fullscreen/main.js

-// Copyright 2013 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.
-
-chrome.app.runtime.onLaunched.addListener(function() {
-  chrome.app.window.create('main.html', {}, function(win) {
-    // The following key events handler will prevent the default behavior for
-    // the ESC key, thus will prevent the ESC key to leave fullscreen.
-    win.contentWindow.document.addEventListener('keydown', function(e) {
-      e.preventDefault();
-    });
-    win.contentWindow.document.addEventListener('keyup', function(e) {
-      e.preventDefault();
-    });
-
-    chrome.test.sendMessage('Launched', function(reply) {
-      var doc = win.contentWindow.document;
-
-      switch (reply) {
-        case 'window':
-          doc.addEventListener('keydown', function(e) {
-            if (e.keyCode != 66) // 'b'
-              return;
-            doc.removeEventListener('keydown', arguments.callee);
-            // We do one trip to the event loop to increase the chances that
-            // fullscreen could have been left before the message is received.
-            setTimeout(function() {
-              chrome.test.sendMessage('B_KEY_RECEIVED');
-            });
-          });
-          win.fullscreen();
-          break;
-
-        case 'dom':
-          doc.addEventListener('keydown', function() {
-            doc.removeEventListener('keydown', arguments.callee);
-
-            doc.addEventListener('keydown', function(e) {
-              if (e.keyCode != 66) // 'b'
-                return;
-              doc.removeEventListener('keydown', arguments.callee);
-              // We do one trip to the event loop to increase the chances that
-              // fullscreen could have been left before the message is received.
-              setTimeout(function() {
-                chrome.test.sendMessage('B_KEY_RECEIVED');
-              });
-            });
-
-            doc.body.webkitRequestFullscreen();
-          });
-          break;
-      }
-    });
-  });
-});