Remove some platform specific stuff from views.

ui/file_manager/file_manager/background/js/background_base.js

Index: ui/file_manager/file_manager/background/js/background_base.js
diff --git a/ui/file_manager/file_manager/background/js/background_base.js b/ui/file_manager/file_manager/background/js/background_base.js
deleted file mode 100644
index bb653020379e18b4135e7d7611ecb152654547ce..0000000000000000000000000000000000000000
--- a/ui/file_manager/file_manager/background/js/background_base.js
+++ /dev/null
@@ -1,47 +0,0 @@
-// 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.
-
-'use strict';
-
-/**
- * Root class of the background page.
- * @constructor
- */
-function BackgroundBase() {
-  /**
-   * Map of all currently open app windows. The key is an app ID.
-   * @type {Object.<string, chrome.app.window.AppWindow>}
-   */
-  this.appWindows = {};
-}
-
-/**
- * Checks the current condition of background page.
- * @return {boolean} True if the background page can be closed. False if not.
- */
-BackgroundBase.prototype.canClose = function() {
-  return true;
-};
-
-/**
- * Checks the current condition of background page and closes it if possible.
- */
-BackgroundBase.prototype.tryClose = function() {
-  if (this.canClose())
-    window.close();
-};
-
-/**
- * Gets similar windows, it means with the same initial url.
- * @param {string} url URL that the obtained windows have.
- * @return {Array.<chrome.app.window.AppWindow>} List of similar windows.
- */
-BackgroundBase.prototype.getSimilarWindows = function(url) {
-  var result = [];
-  for (var appID in this.appWindows) {
-    if (this.appWindows[appID].contentWindow.appInitialURL === url)
-      result.push(this.appWindows[appID]);
-  }
-  return result;
-};