Don't force full repaint on size change in style

LayoutTests/fast/repaint/overflow-into-content-expected.txt

Index: LayoutTests/fast/repaint/overflow-into-content-expected.txt
diff --git a/LayoutTests/fast/repaint/overflow-into-content-expected.txt b/LayoutTests/fast/repaint/overflow-into-content-expected.txt
index bb3f42c9fdcb846857869effe8e5983acefb1997..0ebe2854ea5869d2011a5b632e9e3de3d50e3fb4 100644
--- a/LayoutTests/fast/repaint/overflow-into-content-expected.txt
+++ b/LayoutTests/fast/repaint/overflow-into-content-expected.txt
@@ -7,12 +7,12 @@
       (drawsContent 1)
       (repaint rects
         (rect 111.00 8.00 3.00 106.00)
-        (rect 11.00 161.00 50.00 100.00)
-        (rect 11.00 11.00 100.00 50.00)
+        (rect 108.00 8.00 3.00 106.00)
         (rect 8.00 388.00 100.00 20.00)
         (rect 8.00 388.00 100.00 20.00)
         (rect 8.00 308.00 100.00 100.00)
         (rect 8.00 261.00 106.00 3.00)
+        (rect 8.00 258.00 106.00 3.00)
       )
     )
   )