arc: Use incognito profile for OptIn and cookie fetcher

chrome/browser/resources/chromeos/arc_support/background.js

+// Copyright 2016 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 window that hosts UI. Only one window is allowed.
+ * @type {chrome.app.window.AppWindow}
+ */
+var appWindow = null;
+
+/**
+ * Contains Web content provided by Google authorization server.
+ * @type {WebView}
+ */
+var webview = null;
+
+/**
+ * Used for bidirectional communication with native code.
+ * @type {chrome.runtime.Port}
+ */
+var port = null;
+
+/**
+ * Indicates that window was closed internally and it is not required to send
+ * closure notification.
+ * @type {boolean}
+ */
+var windowClosedInternally = false;
+
+/**
+ * Sends a native message to ArcSupportHost.
+ * @param {string} code The action code in message.
+ */
+function sendNativeMessage(code) {
+  message = {'action': code};
+  port.postMessage(message);
+}
+
+/**
+ * Handles native messages received from ArcSupportHost.
+ * @param {!Object} message The message received.
+ */
+function onNativeMessage(message) {
+  if (!message.action) {
+    return;
+  }
+
+  if (message.action == 'closeUI') {
+    if (appWindow) {
+      windowClosedInternally = true;
+      appWindow.close();
+      appWindow = null;
+    }
+  }
+}
+
+/**
+ * Connects to ArcSupportHost.
+ */
+function connectPort() {
+  var hostName = 'com.google.arc_support';
+  port = chrome.runtime.connectNative(hostName);
+  port.onMessage.addListener(onNativeMessage);
+}
+
+chrome.app.runtime.onLaunched.addListener(function() {
+  var onAppContentLoad = function() {
+    var doc = appWindow.contentWindow.document;
+    webview = doc.getElementById('arc_support');
+
+    var onWebviewRequestCompleted = function(details) {
+      if (details.statusCode == 200) {
+        sendNativeMessage('fetchAuthCode');
+      }
+    };
+
+    var requestFilter = {
+      urls: ['https://accounts.google.com/o/oauth2/programmatic_auth?*'],
+      types: ['main_frame']
+    };
+
+    var requestFilterOptions = ['responseHeaders'];
+
+    webview.request.onCompleted.addListener(onWebviewRequestCompleted,
+                                            requestFilter,
+                                            requestFilterOptions);

[xiyuan, 2016/02/12 18:25:43]

nit: since we don't parsing http header, we can get rid of
|requestFilterOptions|.

+  };
+
+  var onWindowCreated = function(createdWindow) {
+    appWindow = createdWindow;
+    appWindow.contentWindow.onload = onAppContentLoad;
+    createdWindow.onClosed.addListener(onWindowClosed);
+    connectPort();
+  };
+
+  var onWindowClosed = function() {
+    if (windowClosedInternally) {
+      return;
+    }
+    sendNativeMessage('cancelAuthCode');
+  };
+
+  var options = {
+    'id': 'arc_support_wnd',
+    'innerBounds': {
+      'width': 500,
+      'height': 600
+    }
+  };
+  chrome.app.window.create('main.html', options, onWindowCreated);
+});