Reland of place pinch scrollbars with regular scrollbars.

LayoutTests/compositing/geometry/fixed-position.html

Index: LayoutTests/compositing/geometry/fixed-position.html
diff --git a/LayoutTests/compositing/geometry/fixed-position.html b/LayoutTests/compositing/geometry/fixed-position.html
index 986ec08c84dbfd41c50a62e1ae288dad8952ed87..60a86e4cd2476d0f9f295d7c02d55a83faf5dcce 100644
--- a/LayoutTests/compositing/geometry/fixed-position.html
+++ b/LayoutTests/compositing/geometry/fixed-position.html
@@ -7,6 +7,10 @@
   <title>Position fixed</title>
   <script src="../resources/mock_scrollbars.js"></script>
   <style type="text/css" media="screen">
+    ::-webkit-scrollbar {
+      width: 0px;
+      height: 0px;
+    }
     body {
       height: 1000px;
       width: 1000px;