third_party/WebKit/LayoutTests/http/tests/resources/srcset-helper.js

   1 function runTest() {
   2     if (!window.testRunner || !window.sessionStorage)
   3         return;
   4
   5     if (!window.targetScaleFactor)
   6         window.targetScaleFactor = 2;
   7
   8     if (!sessionStorage.scaleFactorIsSet) {
   9         testRunner.waitUntilDone();
  10         testRunner.setBackingScaleFactor(targetScaleFactor, scaleFactorIsSet);
  11     }
  12
  13     if (sessionStorage.pageReloaded && sessionStorage.scaleFactorIsSet) {
  14         delete sessionStorage.pageReloaded;
  15         delete sessionStorage.scaleFactorIsSet;
  16         if (!window.manualNotifyDone) {
  17             setTimeout(function() {
  18                 testRunner.notifyDone();
  19             }, 0);
  20         }
  21     } else {
  22         // Right now there is a bug that srcset does not properly deal with dynamic changes to the scale factor,
  23         // so to work around that, we must reload the page to get the new image.
  24         sessionStorage.pageReloaded = true;
  25         document.location.reload(true);
  26     }
  27 }
  28
  29 function scaleFactorIsSet() {
  30     sessionStorage.scaleFactorIsSet = true;
  31 }
  32
  33 window.addEventListener("load", runTest, false);