Change SVG layout tree output to be more meaningful and consistent

third_party/WebKit/LayoutTests/svg/custom/text-zoom-expected.txt

Index: third_party/WebKit/LayoutTests/svg/custom/text-zoom-expected.txt
diff --git a/third_party/WebKit/LayoutTests/svg/custom/text-zoom-expected.txt b/third_party/WebKit/LayoutTests/svg/custom/text-zoom-expected.txt
index 46c50d759fffe7eb46fdefb69fa597a337500e8d..3a65aec845d7f86b5b980f74b20b7a00ae090ec0 100644
--- a/third_party/WebKit/LayoutTests/svg/custom/text-zoom-expected.txt
+++ b/third_party/WebKit/LayoutTests/svg/custom/text-zoom-expected.txt
@@ -7,6 +7,6 @@ layer at (0,30) size 100x100
   LayoutBlockFlow (positioned) {div} at (0,30) size 100x100 [bgcolor=#FF0000]
 layer at (0,30) size 200x200
   LayoutBlockFlow (positioned) {div} at (0,30) size 200x200
-    LayoutSVGRoot {svg} at (0,30) size 100x100
-      LayoutSVGRect {rect} at (0,30) size 100x100 [fill={[type=SOLID] [color=#008000]}] [x=0.00] [y=0.00] [width=50.00] [height=50.00]
+    LayoutSVGRoot {svg} at (0,0) size 200x200
+      LayoutSVGRect {rect} at (0,0) size 50x50 [fill={[type=SOLID] [color=#008000]}] [x=0.00] [y=0.00] [width=50.00] [height=50.00]
     LayoutText {#text} at (0,0) size 0x0