Remove main frame overflow from some non-scrollbar tests

LayoutTests/ietestcenter/css3/bordersbackgrounds/border-radius-sum-of-radii-002.htm

Index: LayoutTests/ietestcenter/css3/bordersbackgrounds/border-radius-sum-of-radii-002.htm
diff --git a/LayoutTests/ietestcenter/css3/bordersbackgrounds/border-radius-sum-of-radii-002.htm b/LayoutTests/ietestcenter/css3/bordersbackgrounds/border-radius-sum-of-radii-002.htm
index 12e693c84ed9c593e3683a1a3d1c8e1878de6648..0cf6a9cda3cf5ec23c72df818f6d37577620d664 100644
--- a/LayoutTests/ietestcenter/css3/bordersbackgrounds/border-radius-sum-of-radii-002.htm
+++ b/LayoutTests/ietestcenter/css3/bordersbackgrounds/border-radius-sum-of-radii-002.htm
@@ -34,6 +34,7 @@
         <meta name="flags" content="" />
         <meta name="assert" content="When the value of 'f' is less than 1, then all corner radii are reduced by multiplying them with 'f'." />
         <style type="text/css">
+            body { overflow: hidden; }
             div
             {
                 border: 10px red solid;
@@ -107,4 +108,4 @@
         <div id="reference4"></div>
         <div id="test4"></div>
     </body>
-</html>
+</html>