Overlay scrollbars must respect ancestor clip

LayoutTests/compositing/overflow/reflected-overlay-scrollbars-should-respect-ancestor-clip-expected.html

Index: LayoutTests/compositing/overflow/reflected-overlay-scrollbars-should-respect-ancestor-clip-expected.html
diff --git a/LayoutTests/compositing/overflow/reflected-overlay-scrollbars-should-appear-without-compositing.html b/LayoutTests/compositing/overflow/reflected-overlay-scrollbars-should-respect-ancestor-clip-expected.html
similarity index 77%
copy from LayoutTests/compositing/overflow/reflected-overlay-scrollbars-should-appear-without-compositing.html
copy to LayoutTests/compositing/overflow/reflected-overlay-scrollbars-should-respect-ancestor-clip-expected.html
index eb452876432f7923accb250239496a7168487730..ae173e3cd40aa58f640bdbb7292795e9863d5f5c 100644
--- a/LayoutTests/compositing/overflow/reflected-overlay-scrollbars-should-appear-without-compositing.html
+++ b/LayoutTests/compositing/overflow/reflected-overlay-scrollbars-should-respect-ancestor-clip-expected.html
@@ -5,10 +5,10 @@
 }
 
 #clipper {
-  overflow: hidden;
-  width: 110px;
-  height: 100px;
-  margin: 10px;
+    overflow: hidden;
+    width: 95px;
+    height: 100px;
+    margin: 10px;
 }
 
 #scroller {
@@ -25,6 +25,7 @@
     position: fixed;
     left: 200px;
     background: blue;
+    -webkit-transform: translateZ(0);
 }
 
 #scrolled {
@@ -48,10 +49,10 @@ onload = function() {
 };
 </script>
 <div id="container">
-  <div id="clipper">
-    <div id="scroller">
-      <div id="fixed"></div>
-      <div id="scrolled"></div>
+    <div id="clipper">
+        <div id="scroller">
+            <div id="fixed"></div>
+            <div id="scrolled"></div>
+        </div>
     </div>
-  </div>
 </div>