Fix offset issue of background-attachment:fixed on scroller

third_party/WebKit/LayoutTests/paint/overflow/fixed-background-on-scroller-scroll.html

Index: third_party/WebKit/LayoutTests/paint/overflow/fixed-background-on-scroller-scroll.html
diff --git a/third_party/WebKit/LayoutTests/paint/overflow/fixed-background-scroll.html b/third_party/WebKit/LayoutTests/paint/overflow/fixed-background-on-scroller-scroll.html
similarity index 56%
copy from third_party/WebKit/LayoutTests/paint/overflow/fixed-background-scroll.html
copy to third_party/WebKit/LayoutTests/paint/overflow/fixed-background-on-scroller-scroll.html
index f1e672be362048be7661fa9488f473aadb5c1e08..df70dcfe93da4adb7c1212af2847efe46ee440ea 100644
--- a/third_party/WebKit/LayoutTests/paint/overflow/fixed-background-scroll.html
+++ b/third_party/WebKit/LayoutTests/paint/overflow/fixed-background-on-scroller-scroll.html
@@ -4,10 +4,10 @@
   display: none;
 }
 </style>
-Tests painting of fixed background content in scrolled container.
+Tests painting of scrolled container with fixed background.
 Passes if the background doesn't scroll.
-<div id="container" style="width: 200px; height: 200px; overflow: scroll">
-  <div id="content" style="height: 2000px; background: linear-gradient(red, blue); background-attachment: fixed"></div>
+<div id="container" style="width: 200px; height: 200px; overflow: scroll; background: linear-gradient(red, blue); background-attachment: fixed">
+  <div style="height: 2000px"></div>
 </div>
 <script>
 onload = function() {