Fix problems with flakes in SVG LayoutTests by reordering arithmetic.

LayoutTests/svg/filters/filterRes-expected.txt

Index: LayoutTests/svg/filters/filterRes-expected.txt
diff --git a/LayoutTests/svg/filters/filterRes-expected.txt b/LayoutTests/svg/filters/filterRes-expected.txt
index 591ab15cce29e814116142b50861e4eac8af2853..0e2661d2fdf17e83c3fde36e158487e726440da5 100644
--- a/LayoutTests/svg/filters/filterRes-expected.txt
+++ b/LayoutTests/svg/filters/filterRes-expected.txt
@@ -1,7 +1,7 @@
 layer at (0,0) size 800x600
   RenderView at (0,0) size 800x600
 layer at (0,0) size 800x600
-  RenderSVGRoot {svg} at (10,0) size 445x121
+  RenderSVGRoot {svg} at (10,0) size 445x120
     RenderSVGHiddenContainer {defs} at (0,0) size 0x0
       RenderSVGResourceLinearGradient {linearGradient} [id="linGrad"] [gradientUnits=objectBoundingBox] [start=(0,0)] [end=(1,1)]
         RenderSVGGradientStop {stop} [offset=0.00] [color=#FF0000]
@@ -30,7 +30,7 @@ layer at (0,0) size 800x600
       [filter="f1"] RenderSVGResourceFilter {filter} at (10,10) size 100x100
     RenderSVGRect {rect} at (130,10) size 100x100 [fill={[type=SOLID] [color=#000000]}] [x=130.00] [y=10.00] [width=100.00] [height=100.00]
       [filter="over"] RenderSVGResourceFilter {filter} at (130,10) size 100x100
-    RenderSVGContainer {g} at (240,0) size 120x121 [transform={m=((1.00,0.00)(0.00,1.00)) t=(250.00,10.00)}]
+    RenderSVGContainer {g} at (240,0) size 120x120 [transform={m=((1.00,0.00)(0.00,1.00)) t=(250.00,10.00)}]
       [filter="gauss"] RenderSVGResourceFilter {filter} at (-10,-10) size 120x120
       RenderSVGRect {rect} at (250,10) size 75x75 [fill={[type=SOLID] [color=#FF0000]}] [x=0.00] [y=0.00] [width=75.00] [height=75.00]
       RenderSVGRect {rect} at (275,35) size 75x75 [fill={[type=SOLID] [color=#0000FF]}] [x=25.00] [y=25.00] [width=75.00] [height=75.00]