Force compositing/overflow/composited-sticky-element to be composited

third_party/WebKit/LayoutTests/compositing/overflow/composited-sticky-element-expected.html

Index: third_party/WebKit/LayoutTests/compositing/overflow/composited-sticky-element-expected.html
diff --git a/third_party/WebKit/LayoutTests/compositing/overflow/composited-sticky-element-expected.html b/third_party/WebKit/LayoutTests/compositing/overflow/composited-sticky-element-expected.html
index 356061f630bd1be64805830b73e6f6227cffbb25..d9f477eb05eebbe1fb11e816cbc6277a6c089fec 100644
--- a/third_party/WebKit/LayoutTests/compositing/overflow/composited-sticky-element-expected.html
+++ b/third_party/WebKit/LayoutTests/compositing/overflow/composited-sticky-element-expected.html
@@ -4,6 +4,10 @@ onload = function() {
 }
 </script>
 <style>
+.composited {
+  will-change: transform;
+}
+
 #scroller {
   background: white;
   height: 200px;
@@ -20,7 +24,7 @@ onload = function() {
   height: 2000px;
 }
 </style>
-<div id="scroller">
-  <div class="sticky"></div>
+<div id="scroller" class="composited">
+  <div class="composited sticky"></div>
   <div class="spacer"></div>
 </div>