[NaCl SDK] Cleanup examples.

native_client_sdk/src/examples/tutorial/load_progress/check_browser.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.
- */
-
-/**
- * @fileoverview This file provides a BrowserChecker Javascript class.
- * Users can create a BrowserChecker object, invoke checkBrowser(|version|),
- * and then use getIsValidBrowser() and getBrowserSupportStatus()
- * to determine if the browser version is greater than |version|
- * and if the Native Client plugin is found.
- */
-
-// Create a namespace object
-var browser_version = browser_version || {};
-
-/**
- * Class to provide checking for version and NativeClient.
- * @param {integer} arg1 An argument that indicates major version of Chrome we
- *     require, such as 14.
- */
-
-/**
- * Constructor for the BrowserChecker.  Sets the major version of
- * Chrome that is required to |minChromeVersion|.
- * @param minChromeVersion   The earliest major version of chrome that
- *     is supported.  If the Chrome browser version is less than
- *     |minChromeVersion| then |isValidBrowswer| will be set to false.
- * @param opt_maxChromeVersion   Ignored.  Retained for backwards compatibility.
- * @param appVersion  The application version string.
- * @param plugins     The plugins that exist in the browser.
- * @constructor
- */
-browser_version.BrowserChecker = function(minChromeVersion,
-                                          appVersion, plugins,
-                                          opt_maxChromeVersion) {
-  /**
-   * Version specified by the user. This class looks to see if the browser
-   * version is >= |minChromeVersion_|.
-   * @type {integer}
-   * @private
-   */
-  this.minChromeVersion_ = minChromeVersion;
-
-  /**
-   * List of Browser plugin objects.
-   * @type {Ojbect array}
-   * @private
-   */
-  this.plugins_ = plugins;
-
-  /**
-   * Application version string from the Browser.
-   * @type {integer}
-   * @private
-   */
-  this.appVersion_ = appVersion;
-
-  /**
-   * Flag used to indicate if the browser has Native Client and is if the
-   * browser version is recent enough.
-   * @type {boolean}
-   * @private
-   */
-  this.isValidBrowser_ = false;
-
-  /**
-   * Actual major version of Chrome -- found by querying the browser.
-   * @type {integer}
-   * @private
-   */
-  this.chromeVersion_ = null;
-
-  /**
-   * Browser support status. This allows the user to get a detailed status
-   * rather than using this.browserSupportMessage.
-   */
-  this.browserSupportStatus_ =
-      browser_version.BrowserChecker.StatusValues.UNKNOWN;
-}
-
-/**
- * The values used for BrowserChecker status to indicate success or
- * a specific error.
- * @enum {id}
- */
-browser_version.BrowserChecker.StatusValues = {
-  UNKNOWN: 0,
-  NACL_ENABLED: 1,
-  UNKNOWN_BROWSER: 2,
-  CHROME_VERSION_TOO_OLD: 3,
-  NACL_NOT_ENABLED: 4,
-  NOT_USING_SERVER: 5
-};
-
-/**
- * Determines if the plugin with name |name| exists in the browser.
- * @param {string} name The name of the plugin.
- * @param {Object array} plugins The plugins in this browser.
- * @return {bool} |true| if the plugin is found.
- */
-browser_version.BrowserChecker.prototype.pluginExists = function(name,
-                                                                 plugins) {
-  for (var index=0; index < plugins.length; index++) {
-    var plugin = this.plugins_[index];
-    var plugin_name = plugin['name'];
-    // If the plugin is not found, you can use the Javascript console
-    // to see the names of the plugins that were found when debugging.
-    if (plugin_name.indexOf(name) != -1) {
-      return true;
-    }
-  }
-  return false;
-}
-
-/**
- * Returns browserSupportStatus_ which indicates if the browser supports
- * Native Client.  Values are defined as literals in
- * browser_version.BrowserChecker.StatusValues.
- * @ return {int} Level of NaCl support.
- */
-browser_version.BrowserChecker.prototype.getBrowserSupportStatus = function() {
-  return this.browserSupportStatus_;
-}
-
-/**
- * Returns isValidBrowser (true/false) to indicate if the browser supports
- * Native Client.
- * @ return {bool} If this browser has NativeClient and correct version.
- */
-browser_version.BrowserChecker.prototype.getIsValidBrowser = function() {
-  return this.isValidBrowser_;
-}
-
-/**
- * Checks to see if this browser can support Native Client applications.
- * For Chrome browsers, checks to see if the "Native Client" plugin is
- * enabled.
- */
-browser_version.BrowserChecker.prototype.checkBrowser = function() {
-  var versionPatt = /Chrome\/(\d+)\.(\d+)\.(\d+)\.(\d+)/;
-  var result = this.appVersion_.match(versionPatt);
-
-  // |result| stores the Chrome version number.
-  if (!result) {
-    this.isValidBrowser_ = false;
-    this.browserSupportStatus_ =
-        browser_version.BrowserChecker.StatusValues.UNKNOWN_BROWSER;
-  } else {
-    this.chromeVersion_ = result[1];
-    // We know we have Chrome, check version and/or plugin named Native Client
-    if (this.chromeVersion_ >= this.minChromeVersion_) {
-      var found_nacl = this.pluginExists('Native Client', this.plugins_);
-      if (found_nacl) {
-        this.isValidBrowser_ = true;
-        this.browserSupportStatus_ =
-            browser_version.BrowserChecker.StatusValues.NACL_ENABLED;
-      } else {
-        this.isValidBrowser_ = false;
-        this.browserSupportStatus_ =
-            browser_version.BrowserChecker.StatusValues.NACL_NOT_ENABLED;
-      }
-    } else {
-      // We are in a version that is less than |minChromeVersion_|
-      this.isValidBrowser_ = false;
-      this.browserSupportStatus_ =
-          browser_version.BrowserChecker.StatusValues.CHROME_VERSION_TOO_OLD;
-    }
-  }
-  var my_protocol = window.location.protocol;
-  if (my_protocol.indexOf('file') == 0) {
-    this.isValidBrowser_ = false;
-    this.browserSupportStatus_ =
-        browser_version.BrowserChecker.StatusValues.NOT_USING_SERVER;
-  }
-}
-