Change SVG layout tree output to be more meaningful and consistent

third_party/WebKit/LayoutTests/platform/linux/svg/custom/broken-internal-references-expected.txt

 layer at (0,0) size 800x600
   LayoutView at (0,0) size 800x600
 layer at (0,0) size 800x600
-  LayoutSVGRoot {svg} at (19,9) size 102x102
-    LayoutSVGHiddenContainer {defs} at (0,0) size 0x0
+  LayoutSVGRoot {svg} at (0,0) size 800x600
+    LayoutSVGHiddenContainer {defs} at (0,-15) size 418x126.10
       LayoutSVGRect {rect} at (0,0) size 60x10 [fill={[type=SOLID] [color=#000000]}] [x=0.00] [y=0.00] [width=60.00] [height=10.00]
       LayoutSVGResourceLinearGradient {linearGradient} [id="grad-that-is-never-referred"] [gradientUnits=objectBoundingBox] [start=(0,0)] [end=(1,0)]
         LayoutSVGGradientStop {stop} [offset=0.00] [color=#0000FF]
         LayoutSVGGradientStop {stop} [offset=1.00] [color=#FF0000]
-      LayoutSVGPath {path} at (198,13) size 221x99 [stroke={[type=SOLID] [color=#0000FF]}] [data="M 199 89.3 C 206.6 66.6 235.8 13.2 270 30.3 C 286.6 38.6 298.9 59.4 310 73.3 C 321.7 87.9 338.6 99 356 103.3 C 387.3 111.1 396.6 90.4 418 74.3"]
+      LayoutSVGPath {path} at (199,13.20) size 219x97.90 [stroke={[type=SOLID] [color=#0000FF]}] [data="M 199 89.3 C 206.6 66.6 235.8 13.2 270 30.3 C 286.6 38.6 298.9 59.4 310 73.3 C 321.7 87.9 338.6 99 356 103.3 C 387.3 111.1 396.6 90.4 418 74.3"]
       LayoutSVGText {text} at (0,-15) size 128x19 contains 1 chunk(s)
-        LayoutSVGInlineText {#text} at (0,0) size 128x19
+        LayoutSVGInlineText {#text} at (0,-15) size 128x19
           chunk 1 text run 1 at (0.00,0.00) startOffset 0 endOffset 19 width 128.00: "Shoud not be shown."
       LayoutSVGResourceLinearGradient {linearGradient} [id="grad-with-invalid-href"] [gradientUnits=objectBoundingBox] [start=(0,0)] [end=(1,0)]
     LayoutSVGContainer {use} at (0,0) size 0x0 [transform={m=((1.00,0.00)(0.00,1.00)) t=(20.00,10.00)}]
-    LayoutSVGRect {rect} at (19,9) size 102x102 [stroke={[type=SOLID] [color=#0000FF] [stroke width=1.33]}] [fill={[type=LINEAR-GRADIENT] [id="grad-with-invalid-href"]}] [x=20.00] [y=10.00] [width=100.00] [height=100.00]
+    LayoutSVGRect {rect} at (20,10) size 100x100 [stroke={[type=SOLID] [color=#0000FF] [stroke width=1.33]}] [fill={[type=LINEAR-GRADIENT] [id="grad-with-invalid-href"]}] [x=20.00] [y=10.00] [width=100.00] [height=100.00]
     LayoutSVGText {text} at (0,0) size 0x0 contains 1 chunk(s)
       LayoutSVGTextPath {textPath} at (0,0) size 0x0
         LayoutSVGInlineText {#text} at (0,0) size 0x0
       LayoutSVGInlineText {#text} at (0,0) size 0x0
-    LayoutSVGText {text}
+    LayoutSVGText {text} at (0,0) size 0x0