Paint local attachment backgrounds into composited scrolling contents layer

third_party/WebKit/LayoutTests/compositing/overflow/overflow-scroll-with-local-image-background-expected.html

Index: third_party/WebKit/LayoutTests/compositing/overflow/overflow-scroll-with-local-image-background-expected.html
diff --git a/third_party/WebKit/LayoutTests/compositing/overflow/overflow-scroll-with-local-image-background-expected.html b/third_party/WebKit/LayoutTests/compositing/overflow/overflow-scroll-with-local-image-background-expected.html
new file mode 100644
index 0000000000000000000000000000000000000000..5e088183a3e4d0acf39092a0fbbfeae9cc2f88bd
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/compositing/overflow/overflow-scroll-with-local-image-background-expected.html
@@ -0,0 +1,24 @@
+<script>
+onload = function() {
+    document.getElementById('scroller').scrollTop = 200;
+}
+</script>
+<style>
+#scroller {
+    background: url('../resources/apple.jpg') local;
+    border: 10px solid rgba(0, 255, 0, 0.5);
+    overflow: scroll;
+    padding: 10px;
+    width: 200px;
+    height: 200px;
+}
+
+.spacer {
+    height: 300px;
+}
+</style>
+<!-- This scroller has a locally attached background image which should
+    scroll with the content. -->
+<div id="scroller">
+    <div class="spacer"></div>
+</div>