Not for review - Rebase of crrev.com/62833003

LayoutTests/fast/workers/resources/teleport.js

+(function(scope) {
+  'use strict';
+
+  var token = null;
+
+  // An extremely cheesy animation.
+  function tick(context) {
+      var seconds = context.timestamp / 1000.0;
+      var matrix = context.getMatrix(token);
+      matrix.m14 = 200.0 + 100 * Math.sin(seconds);
+      context.setMatrix(token, matrix);
+      scope.teleportMessage(context, tick);
+  }
+
+  scope.onmessage = function(e) {
+    token = e.data;
+    var context = new TeleportContext([token]);
+    scope.teleportMessage(context, tick);
+  };
+
+})(self);