chrome/test/data/prerender/prerender_plugin_power_saver.html

   1 <html>
   2 <!--
   3 This test checks the interaction between prerendering and the Plugin Power Saver
   4 feature. It expects:
   5  - The plugin is not loaded during prerender.
   6  - It is loaded (briefly) during the preroll of the plugin.
   7  - It is replaced by the power saver placeholder after the preroll is over.
   8
   9 This test relies on the Pepper plugin (but not the placeholder) implementing
  10 the postMessage() function on the plugin object.
  11 -->
  12 <head>
  13 <title>Prerender Plugin Delay Loading</title>
  14
  15 <script>
  16 // Make sure plugin was not loaded while prerendering.
  17 function DidPrerenderPass() {
  18   // |plugin| should be the blocked plugin placeholder, rather than the
  19   // test plugin.
  20   var plugin = window.document.getElementById('plugin');
  21   return plugin.postMessage === undefined;
  22 }
  23
  24 // Make sure the plugin briefly exists, then is replaced with a placeholder.
  25 function AwaitPluginPrerollAndPlaceholder() {
  26   var plugin = window.document.getElementById('plugin');
  27   function handleEvent(event) {
  28     // We should eventually get a message indicating that the plugin has been
  29     // throttled and replaced with a static placeholder.
  30     if (event.data.isThrottled && event.data.isHiddenForPlaceholder) {
  31       plugin.removeEventListener('message', handleEvent);
  32       window.domAutomationController.send(true);
  33     }
  34   }
  35
  36   plugin.addEventListener('message', handleEvent);
  37
  38   // If postMessage is not defined, the plugin is still the initial placeholder.
  39   // When the real plugin loads, we will still get the initial power saver
  40   // status notifications.
  41   if (plugin.postMessage !== undefined) {
  42     plugin.postMessage('getPowerSaverStatus');
  43   }
  44 }
  45 </script>
  46
  47 </head>
  48 <body>
  49
  50 <object id="plugin" type="application/x-ppapi-tests" height='100' width='100'>
  51 </object>
  52
  53 </body>
  54 </html>