Deprecate most of gaia_auth extension

chrome/browser/resources/gaia_auth/channel.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.
-
-/**
- * Channel to the background script.
- */
-function Channel() {
-  this.messageCallbacks_ = {};
-  this.internalRequestCallbacks_ = {};
-}
-
-/** @const */
-Channel.INTERNAL_REQUEST_MESSAGE = 'internal-request-message';
-
-/** @const */
-Channel.INTERNAL_REPLY_MESSAGE = 'internal-reply-message';
-
-Channel.prototype = {
-  // Message port to use to communicate with background script.
-  port_: null,
-
-  // Registered message callbacks.
-  messageCallbacks_: null,
-
-  // Internal request id to track pending requests.
-  nextInternalRequestId_: 0,
-
-  // Pending internal request callbacks.
-  internalRequestCallbacks_: null,
-
-  /**
-   * Initialize the channel with given port for the background script.
-   */
-  init: function(port) {
-    this.port_ = port;
-    this.port_.onMessage.addListener(this.onMessage_.bind(this));
-  },
-
-  /**
-   * Connects to the background script with the given name.
-   */
-  connect: function(name) {
-    this.port_ = chrome.runtime.connect({name: name});
-    this.port_.onMessage.addListener(this.onMessage_.bind(this));
-  },
-
-  /**
-   * Associates a message name with a callback. When a message with the name
-   * is received, the callback will be invoked with the message as its arg.
-   * Note only the last registered callback will be invoked.
-   */
-  registerMessage: function(name, callback) {
-    this.messageCallbacks_[name] = callback;
-  },
-
-  /**
-   * Sends a message to the other side of the channel.
-   */
-  send: function(msg) {
-    this.port_.postMessage(msg);
-  },
-
-  /**
-   * Sends a message to the other side and invokes the callback with
-   * the replied object. Useful for message that expects a returned result.
-   */
-  sendWithCallback: function(msg, callback) {
-    var requestId = this.nextInternalRequestId_++;
-    this.internalRequestCallbacks_[requestId] = callback;
-    this.send({
-      name: Channel.INTERNAL_REQUEST_MESSAGE,
-      requestId: requestId,
-      payload: msg
-    });
-  },
-
-  /**
-   * Invokes message callback using given message.
-   * @return {*} The return value of the message callback or null.
-   */
-  invokeMessageCallbacks_: function(msg) {
-    var name = msg.name;
-    if (this.messageCallbacks_[name])
-      return this.messageCallbacks_[name](msg);
-
-    console.error('Error: Unexpected message, name=' + name);
-    return null;
-  },
-
-  /**
-   * Invoked when a message is received.
-   */
-  onMessage_: function(msg) {
-    var name = msg.name;
-    if (name == Channel.INTERNAL_REQUEST_MESSAGE) {
-      var payload = msg.payload;
-      var result = this.invokeMessageCallbacks_(payload);
-      this.send({
-        name: Channel.INTERNAL_REPLY_MESSAGE,
-        requestId: msg.requestId,
-        result: result
-      });
-    } else if (name == Channel.INTERNAL_REPLY_MESSAGE) {
-      var callback = this.internalRequestCallbacks_[msg.requestId];
-      delete this.internalRequestCallbacks_[msg.requestId];
-      if (callback)
-        callback(msg.result);
-    } else {
-      this.invokeMessageCallbacks_(msg);
-    }
-  }
-};
-
-/**
- * Class factory.
- * @return {Channel}
- */
-Channel.create = function() {
-  return new Channel();
-};