Replace pinch scrollbars with regular scrollbars.

LayoutTests/fast/scrolling/overflow-clip-with-page-scale.html

Index: LayoutTests/fast/scrolling/overflow-clip-with-page-scale.html
diff --git a/LayoutTests/fast/scrolling/overflow-clip-with-page-scale.html b/LayoutTests/fast/scrolling/overflow-clip-with-page-scale.html
index 2fb7711a06bf25ee081c1645a44cc95187e369c0..7117baad970be2b32f3ea114b59a94bf5659d3c9 100644
--- a/LayoutTests/fast/scrolling/overflow-clip-with-page-scale.html
+++ b/LayoutTests/fast/scrolling/overflow-clip-with-page-scale.html
@@ -8,6 +8,10 @@ internals.settings.setViewportMetaEnabled(true);
 </script>
 <script src="../../resources/run-after-layout-and-paint.js"></script>
 <style>
+::-webkit-scrollbar {
+    width: 0px;
+    height: 0px;
+}
 body {
   width: 1000px;
   height: 1000px;