Change SVG layout tree output to be more meaningful and consistent

third_party/WebKit/LayoutTests/platform/linux/svg/text/text-selection-spacing-01-b-expected.txt

 layer at (0,0) size 800x600
   LayoutView at (0,0) size 800x600
 layer at (0,0) size 800x600
-  LayoutSVGRoot {svg} at (5,5) size 790x590
-    LayoutSVGContainer {g} at (28,8) size 732x500
-      LayoutSVGContainer {g} at (28,8) size 732x500
-        LayoutSVGText {text} at (3,0) size 55x10 contains 1 chunk(s)
-          LayoutSVGInlineText {#text} at (0,0) size 55x9
+  LayoutSVGRoot {svg} at (0,0) size 800x600
+    LayoutSVGContainer {g} at (2.89,0.81) size 73.02x49.89
+      LayoutSVGContainer {g} at (2.89,0.81) size 73.02x49.89
+        LayoutSVGText {text} at (3,0.81) size 55x8.89 contains 1 chunk(s)
+          LayoutSVGInlineText {#text} at (3,0.81) size 55x8.89
             chunk 1 text run 1 at (3.00,8.00) startOffset 0 endOffset 16 width 55.00: "letter-spacing:0"
-        LayoutSVGText {text} at (3,8) size 42x10 contains 1 chunk(s)
-          LayoutSVGInlineText {#text} at (0,0) size 42x9
+        LayoutSVGText {text} at (3,8.81) size 41.69x8.89 contains 1 chunk(s)
+          LayoutSVGInlineText {#text} at (3,8.81) size 41.69x8.89
             chunk 1 text run 1 at (3.00,16.00) startOffset 0 endOffset 1 width 1.80: "l"
             chunk 1 text run 2 at (3.80,16.00) startOffset 1 endOffset 2 width 4.50: "e"
             chunk 1 text run 3 at (7.30,16.00) startOffset 2 endOffset 3 width 2.20: "t"
             chunk 1 text run 4 at (8.50,16.00) startOffset 3 endOffset 4 width 2.20: "t"
             chunk 1 text run 5 at (9.70,16.00) startOffset 4 endOffset 5 width 4.50: "e"
             chunk 1 text run 6 at (13.20,16.00) startOffset 5 endOffset 6 width 2.70: "r"
             chunk 1 text run 7 at (14.90,16.00) startOffset 6 endOffset 7 width 2.70: "-"
             chunk 1 text run 8 at (16.60,16.00) startOffset 7 endOffset 8 width 4.00: "s"
             chunk 1 text run 9 at (19.60,16.00) startOffset 8 endOffset 9 width 4.50: "p"
             chunk 1 text run 10 at (23.10,16.00) startOffset 9 endOffset 10 width 4.50: "a"
             chunk 1 text run 11 at (26.60,16.00) startOffset 10 endOffset 11 width 4.00: "c"
             chunk 1 text run 12 at (29.60,16.00) startOffset 11 endOffset 12 width 1.80: "i"
             chunk 1 text run 13 at (30.40,16.00) startOffset 12 endOffset 13 width 4.50: "n"
             chunk 1 text run 14 at (33.90,16.00) startOffset 13 endOffset 14 width 4.40: "g"
             chunk 1 text run 15 at (37.30,16.00) startOffset 14 endOffset 15 width 2.20: ":"
             chunk 1 text run 16 at (38.50,16.00) startOffset 15 endOffset 16 width 2.70: "-"
             chunk 1 text run 17 at (40.20,16.00) startOffset 16 endOffset 17 width 4.50: "1"
-        LayoutSVGText {text} at (3,16) size 62x10 contains 1 chunk(s)
-          LayoutSVGInlineText {#text} at (0,0) size 62x9
+        LayoutSVGText {text} at (3,16.81) size 61.98x8.89 contains 1 chunk(s)
+          LayoutSVGInlineText {#text} at (3,16.81) size 61.98x8.89
             chunk 1 text run 1 at (3.00,24.00) startOffset 0 endOffset 1 width 1.80: "l"
             chunk 1 text run 2 at (5.10,24.00) startOffset 1 endOffset 2 width 4.50: "e"
             chunk 1 text run 3 at (9.90,24.00) startOffset 2 endOffset 3 width 2.20: "t"
             chunk 1 text run 4 at (12.40,24.00) startOffset 3 endOffset 4 width 2.20: "t"
             chunk 1 text run 5 at (14.90,24.00) startOffset 4 endOffset 5 width 4.50: "e"
             chunk 1 text run 6 at (19.70,24.00) startOffset 5 endOffset 6 width 2.70: "r"
             chunk 1 text run 7 at (22.70,24.00) startOffset 6 endOffset 7 width 2.70: "-"
             chunk 1 text run 8 at (25.70,24.00) startOffset 7 endOffset 8 width 4.00: "s"
             chunk 1 text run 9 at (30.00,24.00) startOffset 8 endOffset 9 width 4.50: "p"
             chunk 1 text run 10 at (34.80,24.00) startOffset 9 endOffset 10 width 4.50: "a"
             chunk 1 text run 11 at (39.60,24.00) startOffset 10 endOffset 11 width 4.00: "c"
             chunk 1 text run 12 at (43.90,24.00) startOffset 11 endOffset 12 width 1.80: "i"
             chunk 1 text run 13 at (46.00,24.00) startOffset 12 endOffset 13 width 4.50: "n"
             chunk 1 text run 14 at (50.80,24.00) startOffset 13 endOffset 14 width 4.40: "g"
             chunk 1 text run 15 at (55.50,24.00) startOffset 14 endOffset 15 width 2.20: ":"
             chunk 1 text run 16 at (58.00,24.00) startOffset 15 endOffset 16 width 2.20: "."
             chunk 1 text run 17 at (60.50,24.00) startOffset 16 endOffset 17 width 4.50: "3"
-        LayoutSVGText {text} at (2,25) size 65x10 contains 1 chunk(s)
-          LayoutSVGInlineText {#text} at (0,0) size 64x9
+        LayoutSVGText {text} at (2.89,25.81) size 64x8.89 contains 1 chunk(s)
+          LayoutSVGInlineText {#text} at (2.89,25.81) size 64x8.89
             chunk 1 text run 1 at (3.00,33.00) startOffset 0 endOffset 16 width 63.91: "ws:0 - Two Words"
-        LayoutSVGText {text} at (2,33) size 59x10 contains 1 chunk(s)
-          LayoutSVGInlineText {#text} at (0,0) size 58x9
+        LayoutSVGText {text} at (2.89,33.81) size 57.72x8.89 contains 1 chunk(s)
+          LayoutSVGInlineText {#text} at (2.89,33.81) size 57.72x8.89
             chunk 1 text run 1 at (3.00,41.00) startOffset 0 endOffset 6 width 21.30: "ws:-3 "
             chunk 1 text run 2 at (21.30,41.00) startOffset 6 endOffset 8 width 4.90: "- "
             chunk 1 text run 3 at (23.20,41.00) startOffset 8 endOffset 12 width 16.96: "Two "
             chunk 1 text run 4 at (37.16,41.00) startOffset 12 endOffset 17 width 23.46: "Words"
-        LayoutSVGText {text} at (2,41) size 74x10 contains 1 chunk(s)
-          LayoutSVGInlineText {#text} at (0,0) size 74x9
+        LayoutSVGText {text} at (2.89,41.81) size 73.02x8.89 contains 1 chunk(s)
+          LayoutSVGInlineText {#text} at (2.89,41.81) size 73.02x8.89
             chunk 1 text run 1 at (3.00,49.00) startOffset 0 endOffset 5 width 18.60: "ws:3 "
             chunk 1 text run 2 at (24.60,49.00) startOffset 5 endOffset 7 width 4.90: "- "
             chunk 1 text run 3 at (32.50,49.00) startOffset 7 endOffset 11 width 16.96: "Two "
             chunk 1 text run 4 at (52.46,49.00) startOffset 11 endOffset 16 width 23.46: "Words"
-    LayoutSVGText {text} at (5,51) size 40x8 contains 1 chunk(s)
-      LayoutSVGInlineText {#text} at (0,0) size 40x7
+    LayoutSVGText {text} at (5,51.61) size 39.30x6.80 contains 1 chunk(s)
+      LayoutSVGInlineText {#text} at (5,51.61) size 39.30x6.80
         chunk 1 text run 1 at (5.00,57.00) startOffset 0 endOffset 16 width 39.30: "$Revision: 1.6 $"
-    LayoutSVGRect {rect} at (5,5) size 790x590 [stroke={[type=SOLID] [color=#000000]}] [x=1.00] [y=1.00] [width=78.00] [height=58.00]
+    LayoutSVGRect {rect} at (1,1) size 78x58 [stroke={[type=SOLID] [color=#000000]}] [x=1.00] [y=1.00] [width=78.00] [height=58.00]
 selection start: position 1 of child 0 {#text} of child 1 {text} of child 1 {g} of child 13 {g} of child 19 {svg} of document
 selection end:   position 16 of child 0 {#text} of child 15 {text} of child 19 {svg} of document