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-rw-r--r--layout/reftests/native-theme/scroll-thumb-minimum-size-theme.html14
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diff --git a/layout/reftests/native-theme/scroll-thumb-minimum-size-theme.html b/layout/reftests/native-theme/scroll-thumb-minimum-size-theme.html
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+++ b/layout/reftests/native-theme/scroll-thumb-minimum-size-theme.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<div style="width: 200px; height: 200px; overflow: scroll;">
+ <div style="width: 1753px; height: 1753px"></div>
+</div>
+<!--
+See scroll-thumb-minimum-size-notheme.html for the formula.
+
+On XP/Vista at 96 dpi with theme enabled:
+ thumb_size = 17 (minimum size)
+ button_size = 17
+ scrollbar_thickness = 17
+
+ inner_div_size = (200 - 2 * 17 - 17) * (200 / 17) = 1753
+-->