Change SVG layout tree output to be more meaningful and consistent

third_party/WebKit/LayoutTests/platform/mac/svg/text/text-selection-align-04-b-expected.txt

 layer at (0,0) size 800x600
   LayoutView at (0,0) size 800x600
 layer at (0,0) size 800x600
   LayoutSVGRoot {svg} at (0,0) size 800x600
-    LayoutSVGContainer {g} at (0,6) size 795x439
-      LayoutSVGText {text} at (5,4) size 345x45 contains 1 chunk(s)
-        LayoutSVGInlineText {#text} at (0,0) size 345x45
+    LayoutSVGContainer {g} at (-3.50,4) size 480.27x262.59
+      LayoutSVGText {text} at (5,4) size 344.28x44.39 contains 1 chunk(s)
+        LayoutSVGInlineText {#text} at (5,4) size 344.28x44.39
           chunk 1 text run 1 at (5.00,40.00) startOffset 0 endOffset 21 width 344.28: "Test of 'text-anchor'"
-      LayoutSVGHiddenContainer {defs} at (0,0) size 0x0
-        LayoutSVGText {text} at (0,-15) size 79x20 contains 1 chunk(s)
-          LayoutSVGInlineText {#text} at (0,0) size 79x19
+      LayoutSVGHiddenContainer {defs} at (-5,-14.39) size 225x274.39
+        LayoutSVGText {text} at (0,-14.39) size 78.06x18.59 contains 1 chunk(s)
+          LayoutSVGInlineText {#text} at (0,-14.39) size 78.06x18.59
             chunk 1 text run 1 at (0.00,0.00) startOffset 0 endOffset 13 width 77.28: "end text tref"
-        LayoutSVGPath {path} at (0,0) size 0x0 [fill={[type=SOLID] [color=#000000]}] [data="M -5 260 L 220 260"]
-      LayoutSVGText {text} at (20,53) size 216x34 contains 1 chunk(s)
-        LayoutSVGInlineText {#text} at (0,0) size 216x34
+        LayoutSVGPath {path} at (-5,260) size 225x0 [fill={[type=SOLID] [color=#000000]}] [data="M -5 260 L 220 260"]
+      LayoutSVGText {text} at (20,53) size 215.13x33.59 contains 1 chunk(s)
+        LayoutSVGInlineText {#text} at (20,53) size 215.13x33.59
           chunk 1 text run 1 at (20.00,80.00) startOffset 0 endOffset 17 width 215.13: "Tspan, tref, toap"
-      LayoutSVGPath {line} at (365,200) size 3x234 [stroke={[type=SOLID] [color=#FF0000]}] [fill={[type=SOLID] [color=#000000]}] [x1=220.00] [y1=120.00] [x2=220.00] [y2=260.00]
-      LayoutSVGContainer {g} at (0,188) size 795x257
-        LayoutSVGText {text} at (220,113) size 257x34 contains 1 chunk(s)
-          LayoutSVGInlineText {#text} at (0,0) size 124x34
+      LayoutSVGPath {line} at (220,120) size 0x140 [stroke={[type=SOLID] [color=#FF0000]}] [fill={[type=SOLID] [color=#000000]}] [x1=220.00] [y1=120.00] [x2=220.00] [y2=260.00]
+      LayoutSVGContainer {g} at (-3.50,113) size 480.27x153.59
+        LayoutSVGText {text} at (220,113) size 256.77x33.59 contains 1 chunk(s)
+          LayoutSVGInlineText {#text} at (220,113) size 123.36x33.59
             chunk 1 text run 1 at (220.00,140.00) startOffset 0 endOffset 11 width 123.37: "start text "
           LayoutSVGTSpan {tspan} at (0,0) size 134x34
-            LayoutSVGInlineText {#text} at (123,0) size 134x34
+            LayoutSVGInlineText {#text} at (343.36,113) size 133.41x33.59
               chunk 1 text run 1 at (343.37,140.00) startOffset 0 endOffset 10 width 133.42: " red tspan"
-        LayoutSVGText {text} at (63,153) size 314x34 contains 1 chunk(s)
-          LayoutSVGInlineText {#text} at (0,0) size 154x34
+        LayoutSVGText {text} at (63.30,153) size 313.39x33.59 contains 1 chunk(s)
+          LayoutSVGInlineText {#text} at (63.30,153) size 153.39x33.59
             chunk 1 (middle anchor) text run 1 at (63.31,180.00) startOffset 0 endOffset 12 width 153.40: "middle text "
           LayoutSVGTSpan {tspan} at (0,0) size 161x34
-            LayoutSVGInlineText {#text} at (153,0) size 160x34
+            LayoutSVGInlineText {#text} at (216.70,153) size 159.98x33.59
               chunk 1 (middle anchor) text run 1 at (216.70,180.00) startOffset 0 endOffset 11 width 159.99: " bold tspan"
-        LayoutSVGText {text}
-        LayoutSVGText {text} at (-4,233) size 224x34 contains 1 chunk(s)
+        LayoutSVGText {text} at (0,0) size 0x0
+        LayoutSVGText {text} at (-3.50,233) size 223.48x33.59 contains 1 chunk(s)
           LayoutSVGTextPath {textPath} at (0,0) size 224x34
-            LayoutSVGInlineText {#text} at (0,0) size 224x34
+            LayoutSVGInlineText {#text} at (-3.50,233) size 223.48x33.59
               chunk 1 (end anchor) text run 1 at (0.66,260.00) startOffset 12 endOffset 13 width 8.33: " "
               chunk 1 (end anchor) text run 2 at (13.17,260.00) startOffset 13 endOffset 14 width 16.68: "e"
               chunk 1 (end anchor) text run 3 at (29.86,260.00) startOffset 14 endOffset 15 width 16.68: "n"
               chunk 1 (end anchor) text run 4 at (46.54,260.00) startOffset 15 endOffset 16 width 16.68: "d"
               chunk 1 (end anchor) text run 5 at (59.05,260.00) startOffset 16 endOffset 17 width 8.33: " "
               chunk 1 (end anchor) text run 6 at (67.39,260.00) startOffset 17 endOffset 18 width 8.33: "t"
               chunk 1 (end anchor) text run 7 at (79.90,260.00) startOffset 18 endOffset 19 width 16.68: "e"
               chunk 1 (end anchor) text run 8 at (95.74,260.00) startOffset 19 endOffset 20 width 15.00: "x"
               chunk 1 (end anchor) text run 9 at (107.40,260.00) startOffset 20 endOffset 21 width 8.33: "t"
               chunk 1 (end anchor) text run 10 at (115.74,260.00) startOffset 21 endOffset 22 width 8.33: " "
               chunk 1 (end anchor) text run 11 at (128.25,260.00) startOffset 22 endOffset 23 width 16.68: "o"
               chunk 1 (end anchor) text run 12 at (144.93,260.00) startOffset 23 endOffset 24 width 16.68: "n"
               chunk 1 (end anchor) text run 13 at (157.44,260.00) startOffset 24 endOffset 25 width 8.33: " "
               chunk 1 (end anchor) text run 14 at (169.95,260.00) startOffset 25 endOffset 26 width 16.68: "p"
               chunk 1 (end anchor) text run 15 at (186.64,260.00) startOffset 26 endOffset 27 width 16.68: "a"
               chunk 1 (end anchor) text run 16 at (199.15,260.00) startOffset 27 endOffset 28 width 8.33: "t"
               chunk 1 (end anchor) text run 17 at (211.66,260.00) startOffset 28 endOffset 29 width 16.68: "h"
           LayoutSVGInlineText {#text} at (0,0) size 0x0
-    LayoutSVGText {text} at (10,304) size 264x47 contains 1 chunk(s)
-      LayoutSVGInlineText {#text} at (0,0) size 264x47
+    LayoutSVGText {text} at (10,304) size 263.31x46.19 contains 1 chunk(s)
+      LayoutSVGInlineText {#text} at (10,304) size 263.31x46.19
         chunk 1 text run 1 at (10.00,340.00) startOffset 0 endOffset 16 width 263.31: "$Revision: 1.5 $"
-    LayoutSVGRect {rect} at (0,0) size 800x600 [stroke={[type=SOLID] [color=#000000]}] [x=1.00] [y=1.00] [width=478.00] [height=358.00]
+    LayoutSVGRect {rect} at (1,1) size 478x358 [stroke={[type=SOLID] [color=#000000]}] [x=1.00] [y=1.00] [width=478.00] [height=358.00]
 selection start: position 0 of child 0 {#text} of child 1 {text} of child 13 {g} of child 28 {svg} of document
 selection end:   position 16 of child 0 {#text} of child 15 {text} of child 28 {svg} of document