Added Dartium changes onto 45.0.2454.104

LayoutTests/dart/dom/resources/pong.js

Index: LayoutTests/dart/dom/resources/pong.js
diff --git a/LayoutTests/dart/dom/resources/pong.js b/LayoutTests/dart/dom/resources/pong.js
new file mode 100644
index 0000000000000000000000000000000000000000..c11adb170c15dd3a27582d20722e8c27974f3312
--- /dev/null
+++ b/LayoutTests/dart/dom/resources/pong.js
@@ -0,0 +1,7 @@
+onmessage = function(event) {
+  if (event.data == 'How do you do?') {
+    postMessage('I am fine, thank you.');
+    return;
+  }
+  postMessage('Where are your manners, young man?');
+}