Make data: urls always parse async

LayoutTests/scrollingcoordinator/resources/non-fast-scrollable-region-testing.js

Index: LayoutTests/scrollingcoordinator/resources/non-fast-scrollable-region-testing.js
diff --git a/LayoutTests/scrollingcoordinator/resources/non-fast-scrollable-region-testing.js b/LayoutTests/scrollingcoordinator/resources/non-fast-scrollable-region-testing.js
index 3e085b419b9c9d64b5e3d169ce2e424298846a1e..594662b2f74d9db57abdc6c42c0881b1c338bfbe 100644
--- a/LayoutTests/scrollingcoordinator/resources/non-fast-scrollable-region-testing.js
+++ b/LayoutTests/scrollingcoordinator/resources/non-fast-scrollable-region-testing.js
@@ -1,6 +1,11 @@
+// setMockScrollbarsEnabled doesn't actually invalidate scrollbars
+// so if we don't set it immediately, they won't repaint/relayout
+// correctly!  http://crbug.com/365509
+if (window.internals)
+    window.internals.settings.setMockScrollbarsEnabled(true);
+
 function runNonFastScrollableRegionTest(scale) {
     var invScale;
-    window.internals.settings.setMockScrollbarsEnabled(true);
     if (scale != undefined) {
         if (window.eventSender)
             eventSender.setPageScaleFactor(scale, 0, 0);