CL for perf tryjob on android

tools/perf/page_sets/key_silk_cases/masonry.html

 <style>
 body {
   display: none;
   margin: 0;
 }
 .item {
   max-width: 200px;
   border: 2px solid red;
   margin: 1px;
 }
@@ skipping 1098 matching lines @@
             }
             return -1
         };
         "function" == typeof define && define.amd ? define(["outlayer/outlayer",
             "get-size/get-size"], b) : "object" == typeof exports ?
           module.exports = b(require("outlayer"), require("get-size")) :
           a.Masonry = b(a.Outlayer, a.getSize)
     }(window);
 var container = document.querySelector('#container');
 var item = container.children[0];
-for (var i = 0; i < 100; ++i) {
+for (var i = 0; i < 20; ++i) {
   container.appendChild(item.cloneNode(true));
 }
 document.body.style.display = 'block';
 window.done = false;
 window.brick = function() {
   var mason = new Masonry(container, {
     itemSelector: '.item',
   });
-  requestAnimationFrame(function() {
-    mason.element.style.maxWidth = '950px';
-    mason.layout();
+  function relayout(i) {
+    if (i === 10) {
+      window.done = true;
+      return;
+    }
     requestAnimationFrame(function() {
-      window.done = true;
+      mason.element.style.maxWidth = '950px';
+      mason.layout();
+      requestAnimationFrame(function() {
+        mason.element.style.maxWidth = '200px';
+        mason.layout();
+        requestAnimationFrame(function() {
+          relayout(i + 1);
+        });
+      });
     });
-  });
+  }
+  relayout(0);
 };
 </script>