add a test app using notification provider API

chrome/test/data/extensions/api_test/notification_provider/test_app/main.js

+// Window initialization code. Set up event handlers
+window.addEventListener("load", function() {
+  // set up the event listeners
+  chrome.notificationProvider.onCreated.addListener(notificationCreated);
+  chrome.notificationProvider.onUpdated.addListener(notificationUpdated);
+  chrome.notificationProvider.onCleared.addListener(notificationCleared);
+});
+
+function displayImage(text, bitmap, div) {
+  var image = document.createElement("p");
+  image.appendChild(document.createTextNode(text));
+  var imageCanvas = document.createElement("canvas");
+  image.appendChild(imageCanvas);
+  div.appendChild(image);
+
+  var imageContext = imageCanvas.getContext('2d');
+  imageCanvas.width = bitmap.width;
+  imageCanvas.height = bitmap.height;
+  var imagedata = imageContext.createImageData(bitmap.width,
+                                              bitmap.height);
+  var dataView = new Uint8Array(bitmap.data);
+  for (var i = 0; i < bitmap.width * bitmap.height * 4; i += 1) {
+    imagedata.data[i] = dataView[i];
+  }
+  imageContext.putImageData(imagedata, 0, 0);
+}
+
+function addNotification(senderId, notificationId, details) {
+  console.log("--JS--- add notification");
+  var list = document.getElementById("notification_list");
+
+  var div = document.createElement("div");
+  div.class = "notifications";
+  div.id = senderId + notificationId;
+
+  line = document.createElement("br");
+  div.appendChild(line);
+
+  // close button
+  var closeButton = document.createElement("button");
+  closeButton.class = "closeButtons";
+  var buttonText = document.createTextNode("close notificaiton");
+  closeButton.appendChild(buttonText);
+  div.appendChild(closeButton);
+  closeButton.addEventListener("click", function(){
+      clearNotification(senderId, notificationId)
+  }, false);
+
+  // title
+  var bold = document.createElement("b");
+  var title = document.createElement("p");
+  bold.appendChild(document.createTextNode(details.title));
+  title.appendChild(bold);
+  div.appendChild(title);
+
+  // id
+  var id = document.createElement("p");
+  id.appendChild(document.createTextNode("Notification ID: " + notificationId));
+  div.appendChild(id);
+
+  // type
+  var notType = document.createElement("p");
+  notType.appendChild(document.createTextNode("Type: " + details.type));
+  div.appendChild(notType);
+
+  // priority
+  var priority = document.createElement("p");
+  priority.appendChild(document.createTextNode("Priority: " +
+                                               details.priority));
+  div.appendChild(priority);
+
+  // message
+  var message = document.createElement("p");
+  message.appendChild(document.createTextNode("Message: " + details.message));
+  div.appendChild(message);
+
+  // icon
+  displayImage("Icon: ", details.iconBitmap, div);
+
+  // context message
+  if ("contextMessage" in details) {
+    var message = document.createElement("p");
+    message.appendChild(document.createTextNode("Message: " + details.message));
+    div.appendChild(message);
+  }
+
+  // progress
+  if (details.type == "progress" && "progress" in details) {
+    var progress = document.createElement("p");
+    progress.appendChild(document.createTextNode("Progress: " +
+                                                 details.progress));
+    div.appendChild(progress);
+  }
+
+  // isClickable
+  if ("isClickable" in details) {
+    var clickable = document.createElement("p");
+    clickable.appendChild(document.createTextNode("IsClickable: " +
+                                                  details.isClickable));
+    div.appendChild(clickable);
+  }
+
+  // eventTime
+  if ("eventTime" in details) {
+    var time = document.createElement("p");
+    time.appendChild(document.createTextNode("Event Time: " +
+                                             details.eventTime));
+    div.appendChild(time);
+  }
+
+  // list
+  if (details.tyep = "list" && "items" in details) {

[Pete Williamson, 2014/08/14 00:07:55]

tyep -> type?

[liyanhou, 2014/08/14 00:41:50]

Done.

+    for (var i = 0, size = details.items.length; i < size; i++) {
+      var item = document.createElement("p");
+      item.appendChild(document.createTextNode(
+                                "Item " + (i+1) + ": " +
+                                details.items[i].title + " - " +
+                                details.items[i].message));
+      div.appendChild(item);
+    }
+  }
+
+  // image
+  if (details.type = "image" && "imageBitmap" in details) {
+    displayImage("Image: ", details.imageBitmap, div);
+  }
+
+  // buttons
+  if ("buttons" in details) {
+    for (var i = 0, size = details.buttons.length; i < size; i++) {
+      var button = document.createElement("p");
+      // TODO: add button image after image is implemented

[Pete Williamson, 2014/08/14 00:07:55]

If you actually check in a TODO (instead of doing it beforehand), put your name
by it (that doesn't mean that you have to do it, that means that you are the one
who made the coment)

ex:
  // TODO(liyanhou): Add button image after image is implemented.

Also, please check the whole file to make sure comments begin with a capital
letter and end with a period, and that you use complete sentences (it is our
coding style guideline for chromium).

[liyanhou, 2014/08/14 00:41:50]

Done.

+      button.appendChild(document.createTextNode(
+                  "Button " + (i+1) + ": " + details.buttons[i].title));
+      div.appendChild(button);
+    }
+  }
+
+  div.appendChild(document.createElement("br"));
+  list.appendChild(div);
+}
+
+function clearedCallback(ifCleared){}
+
+function clearNotification(senderId, notificationId) {
+  var list = document.getElementById("notification_list");
+  list.removeChild(document.getElementById(senderId + notificationId));
+  chrome.notificationProvider.notifyOnCleared(senderId,
+                                              notificationId,
+                                              clearedCallback);
+}
+
+function notificationCreated(senderId, notificationId, details){
+  addNotification(senderId, notificationId, details);
+}
+
+function notificationUpdated(senderId, notificationId, details){
+  var list = document.getElementById("notification_list");
+  list.removeChild(document.getElementById(senderId + notificationId));
+  addNotification(senderId, notificationId, details);
+}
+
+function notificationCleared(senderId, notificationId){
+  clearNotification(senderId, notificationId);
+}