arc: Use incognito profile for OptIn and cookie fetcher

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

Index: chrome/browser/resources/chromeos/arc_support/background.js
diff --git a/chrome/browser/resources/chromeos/arc_support/background.js b/chrome/browser/resources/chromeos/arc_support/background.js
new file mode 100644
index 0000000000000000000000000000000000000000..a0ce0a5ad7a92534e4ff1869976ab8f8cf73f113
--- /dev/null
+++ b/chrome/browser/resources/chromeos/arc_support/background.js
@@ -0,0 +1,80 @@
+// 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.

[xiyuan, 2016/02/12 17:06:59]

nit: Use JsDoc style and also doc type

/**
 * Chrome window that hosts UI. Only one window is allowed.
 * @type {chrome.app.window.AppWindow}
 */

[khmel, 2016/02/12 18:15:14]

Done.

+var appWindow = null;
+
+// Contains Web content provided by Google authorization server.

[xiyuan, 2016/02/12 17:06:59]

/**
 * Contains Web content provided by Google authorization server.
 * @type {WebView}
 */

[khmel, 2016/02/12 18:15:15]

Done.

+var webview = null;
+
+// Used for bidirectional communication with native code.

[xiyuan, 2016/02/12 17:06:59]

/**
 * Used for bidirectional communication with native code.
 * @type {chrome.runtime.Port}
 */

[khmel, 2016/02/12 18:15:14]

Done.

+var port = null;
+
+// Indicates that window was closed internally and it is not required to send
+// closure notification.

[xiyuan, 2016/02/12 17:06:59]

/**
 * Indicates that window was closed internally and it is not required to send
 * closure notification.
 * @type {boolean}
 */ 

[khmel, 2016/02/12 18:15:14]

Done.

+var windowClosedInternally = false;
+
+function sendNativeMessage(code) {

[xiyuan, 2016/02/12 17:06:59]

/**
 * Sends a native message to ArcSupportHost.
 * @param {string} code The action code in message.
 */

[khmel, 2016/02/12 18:15:14]

Done.

+  message = {'action': code};
+  port.postMessage(message);
+}
+
+function onNativeMessage(message) {

[xiyuan, 2016/02/12 17:06:59]

/**
 * Handles native messages received from ArcSupportHost.
 * @param {!Object} message The message received.
 */

[khmel, 2016/02/12 18:15:15]

Done.

+  if (!message.action) {
+    return;
+  }
+
+  if (message.action == 'closeUI') {
+    if (appWindow) {
+      windowClosedInternally = true;
+      appWindow.contentWindow.close();

[xiyuan, 2016/02/12 17:06:59]

nit: appWindow.close();

[khmel, 2016/02/12 18:15:15]

Done.

+      appWindow = null;
+    }
+  }
+}
+
+function connectPort() {

[xiyuan, 2016/02/12 17:06:59]

/**
 * Connects to ArcSupportHost.
 */

[khmel, 2016/02/12 18:15:15]

Done.

+  var hostName = 'com.google.arc_support';
+  port = chrome.runtime.connectNative(hostName);
+  port.onMessage.addListener(onNativeMessage);
+}
+
+chrome.app.runtime.onLaunched.addListener(function() {
+  var onContentLoad = function() {

[xiyuan, 2016/02/12 17:06:59]

nit: onContentLoad -> onAppContentLoad to make it clear that this is the load
event handler for the app window.

[khmel, 2016/02/12 18:15:14]

Done.

+    var doc = appWindow.contentWindow.document;
+    webview = doc.getElementById('arc_support');
+
+    var onLoadStop = function() {
+      if (webview.src.indexOf(
+          'https://accounts.google.com/o/oauth2/programmatic_auth') == 0) {
+        sendNativeMessage('fetchAuthCode');
+      }
+    };
+
+    webview.addEventListener('loadstop', onLoadStop);

[xiyuan, 2016/02/12 17:06:59]

loadstop is indeed tricky and triggering unnecessary FetchAuthCode calls is not
good. I wonder whether we should switch to some other event. Maybe use the
webrequest event as we did for the login?

Look for webview_.request.onCompleted.addListener in authenticator.js

https://code.google.com/p/chromium/codesearch#chromium/src/chrome/browser/res...

[khmel, 2016/02/12 18:15:14]

Thanks for hint! It works much better and predictable.

+  };
+
+  var onWindowCreated = function(createdWindow) {
+    appWindow = createdWindow;
+    appWindow.contentWindow.onload = onContentLoad;
+    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);
+});