Change SVG layout tree output to be more meaningful and consistent

third_party/WebKit/LayoutTests/svg/custom/use-in-symbol-with-offset-expected.txt

Index: third_party/WebKit/LayoutTests/svg/custom/use-in-symbol-with-offset-expected.txt
diff --git a/third_party/WebKit/LayoutTests/svg/custom/use-in-symbol-with-offset-expected.txt b/third_party/WebKit/LayoutTests/svg/custom/use-in-symbol-with-offset-expected.txt
index 61035fb4eb260e8f420fab4b059aed3e51f9d3be..f326172ccb0b2a1d4aee940da254724f16d4957a 100644
--- a/third_party/WebKit/LayoutTests/svg/custom/use-in-symbol-with-offset-expected.txt
+++ b/third_party/WebKit/LayoutTests/svg/custom/use-in-symbol-with-offset-expected.txt
@@ -3,20 +3,20 @@ layer at (0,0) size 800x600
 layer at (0,0) size 100x100
   LayoutSVGRoot {svg} at (0,0) size 100x100
     LayoutSVGHiddenContainer {defs} at (0,0) size 0x0
-      LayoutSVGHiddenContainer {symbol} at (0,0) size 0x0
+      LayoutSVGHiddenContainer {symbol} at (0,0) size 1x2
         LayoutSVGRect {rect} at (0,0) size 1x2 [fill={[type=SOLID] [color=#008000]}] [x=0.00] [y=0.00] [width=1.00] [height=2.00]
-      LayoutSVGHiddenContainer {symbol} at (0,0) size 0x0
+      LayoutSVGHiddenContainer {symbol} at (0,0) size 2x2
         LayoutSVGContainer {use} at (0,0) size 1x2
           LayoutSVGViewportContainer {svg} at (0,0) size 1x2
             LayoutSVGRect {rect} at (0,0) size 1x2 [fill={[type=SOLID] [color=#008000]}] [x=0.00] [y=0.00] [width=1.00] [height=2.00]
-        LayoutSVGContainer {use} at (1,0) size 1x2 [transform={m=((1.00,0.00)(0.00,1.00)) t=(1.00,0.00)}]
-          LayoutSVGViewportContainer {svg} at (1,0) size 1x2
-            LayoutSVGRect {rect} at (1,0) size 1x2 [fill={[type=SOLID] [color=#008000]}] [x=0.00] [y=0.00] [width=1.00] [height=2.00]
+        LayoutSVGContainer {use} at (0,0) size 1x2 [transform={m=((1.00,0.00)(0.00,1.00)) t=(1.00,0.00)}]
+          LayoutSVGViewportContainer {svg} at (0,0) size 1x2
+            LayoutSVGRect {rect} at (0,0) size 1x2 [fill={[type=SOLID] [color=#008000]}] [x=0.00] [y=0.00] [width=1.00] [height=2.00]
     LayoutSVGContainer {use} at (0,0) size 100x100
-      LayoutSVGViewportContainer {svg} at (0,0) size 100x100
-        LayoutSVGContainer {g} at (0,0) size 50x100
-          LayoutSVGViewportContainer {svg} at (0,0) size 50x100
-            LayoutSVGRect {rect} at (0,0) size 50x100 [fill={[type=SOLID] [color=#008000]}] [x=0.00] [y=0.00] [width=1.00] [height=2.00]
-        LayoutSVGContainer {g} at (50,0) size 50x100 [transform={m=((1.00,0.00)(0.00,1.00)) t=(1.00,0.00)}]
-          LayoutSVGViewportContainer {svg} at (50,0) size 50x100
-            LayoutSVGRect {rect} at (50,0) size 50x100 [fill={[type=SOLID] [color=#008000]}] [x=0.00] [y=0.00] [width=1.00] [height=2.00]
+      LayoutSVGViewportContainer {svg} at (0,0) size 2x2
+        LayoutSVGContainer {g} at (0,0) size 1x2
+          LayoutSVGViewportContainer {svg} at (0,0) size 1x2
+            LayoutSVGRect {rect} at (0,0) size 1x2 [fill={[type=SOLID] [color=#008000]}] [x=0.00] [y=0.00] [width=1.00] [height=2.00]
+        LayoutSVGContainer {g} at (0,0) size 1x2 [transform={m=((1.00,0.00)(0.00,1.00)) t=(1.00,0.00)}]
+          LayoutSVGViewportContainer {svg} at (0,0) size 1x2
+            LayoutSVGRect {rect} at (0,0) size 1x2 [fill={[type=SOLID] [color=#008000]}] [x=0.00] [y=0.00] [width=1.00] [height=2.00]