Fix getBBox() returning (0,0) bug when width or height is zero

LayoutTests/platform/linux/svg/W3C-SVG-1.1/filters-felem-01-b-expected.txt

Index: LayoutTests/platform/linux/svg/W3C-SVG-1.1/filters-felem-01-b-expected.txt
diff --git a/LayoutTests/platform/win/svg/W3C-SVG-1.1/filters-felem-01-b-expected.txt b/LayoutTests/platform/linux/svg/W3C-SVG-1.1/filters-felem-01-b-expected.txt
similarity index 77%
copy from LayoutTests/platform/win/svg/W3C-SVG-1.1/filters-felem-01-b-expected.txt
copy to LayoutTests/platform/linux/svg/W3C-SVG-1.1/filters-felem-01-b-expected.txt
index b9d803001cb6c803b284769ffd20a3ea2f88accd..afb6233d5c2cc303b08cbb8251a8b651ded5c6af 100644
--- a/LayoutTests/platform/win/svg/W3C-SVG-1.1/filters-felem-01-b-expected.txt
+++ b/LayoutTests/platform/linux/svg/W3C-SVG-1.1/filters-felem-01-b-expected.txt
@@ -2,31 +2,31 @@ layer at (0,0) size 480x360
   RenderView at (0,0) size 480x360
 layer at (0,0) size 480x360
   RenderSVGRoot {svg} at (0,0) size 480x360
-    RenderSVGContainer {g} at (82,20) size 359x265
+    RenderSVGContainer {g} at (82,19) size 359x266
       RenderSVGHiddenContainer {defs} at (0,0) size 0x0
         RenderSVGResourceFilter {filter} [id="null"] [filterUnits=objectBoundingBox] [primitiveUnits=userSpaceOnUse]
         RenderSVGResourceFilter {filter} [id="nullreg"] [filterUnits=objectBoundingBox] [primitiveUnits=userSpaceOnUse]
-      RenderSVGContainer {g} at (90,20) size 80x115
-        RenderSVGEllipse {circle} at (100,30) size 60x60 [fill={[type=SOLID] [color=#FF0000]}] [cx=130.00] [cy=60.00] [r=30.00]
-        RenderSVGEllipse {circle} at (90,20) size 80x80 [fill={[type=SOLID] [color=#000000]}] [cx=130.00] [cy=60.00] [r=40.00]
+      RenderSVGContainer {g} at (89,19) size 82x116
+        RenderSVGEllipse {circle} at (99,29) size 62x62 [fill={[type=SOLID] [color=#FF0000]}] [cx=130.00] [cy=60.00] [r=30.00]
+        RenderSVGEllipse {circle} at (89,19) size 82x82 [fill={[type=SOLID] [color=#000000]}] [cx=130.00] [cy=60.00] [r=40.00]
         RenderSVGText {text} at (96,113) size 68x22 contains 1 chunk(s)
           RenderSVGInlineText {#text} at (0,0) size 68x22
             chunk 1 (middle anchor) text run 1 at (96.00,130.00) startOffset 0 endOffset 9 width 68.00: "No filter"
       RenderSVGContainer {g} at (82,162) size 96x123
-        RenderSVGEllipse {circle} at (100,180) size 60x60 [fill={[type=SOLID] [color=#FF0000]}] [cx=130.00] [cy=210.00] [r=30.00]
+        RenderSVGEllipse {circle} at (99,179) size 62x62 [fill={[type=SOLID] [color=#FF0000]}] [cx=130.00] [cy=210.00] [r=30.00]
         RenderSVGEllipse {circle} at (82,162) size 96x96 [fill={[type=SOLID] [color=#000000]}] [cx=130.00] [cy=210.00] [r=40.00]
           [filter="null"] RenderSVGResourceFilter {filter} at (82,162) size 96x96
         RenderSVGText {text} at (90,263) size 80x22 contains 1 chunk(s)
           RenderSVGInlineText {#text} at (0,0) size 79x22
             chunk 1 (middle anchor) text run 1 at (90.50,280.00) startOffset 0 endOffset 11 width 79.00: "Null filter"
-      RenderSVGContainer {g} at (258,20) size 144x115
-        RenderSVGEllipse {circle} at (300,30) size 60x60 [fill={[type=SOLID] [color=#FF0000]}] [cx=330.00] [cy=60.00] [r=30.00]
-        RenderSVGEllipse {circle} at (290,20) size 80x80 [fill={[type=SOLID] [color=#000000]}] [cx=330.00] [cy=60.00] [r=40.00]
+      RenderSVGContainer {g} at (258,19) size 144x116
+        RenderSVGEllipse {circle} at (299,29) size 62x62 [fill={[type=SOLID] [color=#FF0000]}] [cx=330.00] [cy=60.00] [r=30.00]
+        RenderSVGEllipse {circle} at (289,19) size 82x82 [fill={[type=SOLID] [color=#000000]}] [cx=330.00] [cy=60.00] [r=40.00]
         RenderSVGText {text} at (258,113) size 144x22 contains 1 chunk(s)
           RenderSVGInlineText {#text} at (0,0) size 144x22
             chunk 1 (middle anchor) text run 1 at (258.00,130.00) startOffset 0 endOffset 19 width 144.00: "Non-existant filter"
-      RenderSVGContainer {g} at (219,180) size 222x105
-        RenderSVGEllipse {circle} at (300,180) size 60x60 [fill={[type=SOLID] [color=#FF0000]}] [cx=330.00] [cy=210.00] [r=30.00]
+      RenderSVGContainer {g} at (219,179) size 222x106
+        RenderSVGEllipse {circle} at (299,179) size 62x62 [fill={[type=SOLID] [color=#FF0000]}] [cx=330.00] [cy=210.00] [r=30.00]
         RenderSVGEllipse {circle} at (322,202) size 16x16 [fill={[type=SOLID] [color=#000000]}] [cx=330.00] [cy=210.00] [r=40.00]
           [filter="nullreg"] RenderSVGResourceFilter {filter} at (322,202) size 16x16
         RenderSVGText {text} at (219,263) size 222x22 contains 1 chunk(s)