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

LayoutTests/platform/linux/svg/W3C-SVG-1.1/styling-css-03-b-expected.txt

Index: LayoutTests/platform/linux/svg/W3C-SVG-1.1/styling-css-03-b-expected.txt
diff --git a/LayoutTests/platform/win/svg/W3C-SVG-1.1/styling-css-03-b-expected.txt b/LayoutTests/platform/linux/svg/W3C-SVG-1.1/styling-css-03-b-expected.txt
similarity index 88%
copy from LayoutTests/platform/win/svg/W3C-SVG-1.1/styling-css-03-b-expected.txt
copy to LayoutTests/platform/linux/svg/W3C-SVG-1.1/styling-css-03-b-expected.txt
index 601b55a68d9fbda3971047773bf41194a12acc1b..8c3db30f6f1e84ddb5e32182d0806c15b7cfa9f0 100644
--- a/LayoutTests/platform/win/svg/W3C-SVG-1.1/styling-css-03-b-expected.txt
+++ b/LayoutTests/platform/linux/svg/W3C-SVG-1.1/styling-css-03-b-expected.txt
@@ -2,7 +2,7 @@ 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 (40,2) size 350x278
+    RenderSVGContainer {g} at (40,2) size 350x279
       RenderSVGHiddenContainer {defs} at (0,0) size 0x0
       RenderSVGText {text} at (40,2) size 190x15 contains 1 chunk(s)
         RenderSVGInlineText {#text} at (0,0) size 190x15
@@ -11,12 +11,12 @@ layer at (0,0) size 480x360
         RenderSVGInlineText {#text} at (0,0) size 266x15
           chunk 1 text run 1 at (40.00,36.00) startOffset 0 endOffset 11 width 57.00: "This tests "
           chunk 1 text run 1 at (97.00,36.00) startOffset 0 endOffset 38 width 209.00: "ancestor selectors and child selectors"
-      RenderSVGContainer {g} at (130,70) size 260x60
+      RenderSVGContainer {g} at (129,69) size 261x62
         RenderSVGRect {rect} at (220,80) size 60x40 [fill={[type=SOLID] [color=#FF0000]}] [x=220.00] [y=80.00] [width=60.00] [height=40.00]
-        RenderSVGEllipse {circle} at (130,70) size 60x60 [fill={[type=SOLID] [color=#008000]}] [cx=160.00] [cy=100.00] [r=30.00]
+        RenderSVGEllipse {circle} at (129,69) size 62x62 [fill={[type=SOLID] [color=#008000]}] [cx=160.00] [cy=100.00] [r=30.00]
         RenderSVGContainer {g} at (300,70) size 90x50
           RenderSVGPath {polygon} at (300,70) size 90x50 [fill={[type=SOLID] [color=#008000]}] [points="300 100 320 120 340 110 360 120 390 90 340 70"]
-      RenderSVGContainer {g} at (40,152) size 350x128 [transform={m=((1.00,0.00)(0.00,1.00)) t=(0.00,150.00)}]
+      RenderSVGContainer {g} at (40,152) size 350x129 [transform={m=((1.00,0.00)(0.00,1.00)) t=(0.00,150.00)}]
         RenderSVGText {text} at (40,2) size 266x15 contains 1 chunk(s)
           RenderSVGInlineText {#text} at (0,0) size 266x15
             chunk 1 text run 1 at (40.00,14.00) startOffset 0 endOffset 51 width 266.00: "Circle should be red not green; rectangle still red"
@@ -24,8 +24,8 @@ layer at (0,0) size 480x360
           RenderSVGInlineText {#text} at (0,0) size 342x15
             chunk 1 text run 1 at (40.00,36.00) startOffset 0 endOffset 11 width 57.00: "This tests "
             chunk 1 text run 1 at (97.00,36.00) startOffset 0 endOffset 53 width 285.00: "ancestor, immediate-sibling and first-child selectors"
-        RenderSVGContainer {g} at (130,220) size 260x60
-          RenderSVGEllipse {circle} at (130,220) size 60x60 [fill={[type=SOLID] [color=#FF0000]}] [cx=160.00] [cy=100.00] [r=30.00]
+        RenderSVGContainer {g} at (129,219) size 261x62
+          RenderSVGEllipse {circle} at (129,219) size 62x62 [fill={[type=SOLID] [color=#FF0000]}] [cx=160.00] [cy=100.00] [r=30.00]
           RenderSVGRect {rect} at (220,230) size 60x40 [fill={[type=SOLID] [color=#FF0000]}] [x=220.00] [y=80.00] [width=60.00] [height=40.00]
           RenderSVGPath {polygon} at (300,220) size 90x50 [fill={[type=SOLID] [color=#008000]}] [points="300 100 320 120 340 110 360 120 390 90 340 70"]
     RenderSVGText {text} at (10,304) size 261x46 contains 1 chunk(s)