Change SVG layout tree output to be more meaningful and consistent

third_party/WebKit/LayoutTests/platform/linux/svg/text/text-selection-tselect-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 (0,0) size 800x600
-    LayoutSVGContainer {g} at (0,0) size 800x600
-      LayoutSVGText {text} at (10,4) size 309x20 contains 1 chunk(s)
-        LayoutSVGInlineText {#text} at (0,0) size 309x20
+    LayoutSVGContainer {g} at (1,1) size 478x358
+      LayoutSVGText {text} at (10,4.41) size 308.42x19.19 contains 1 chunk(s)
+        LayoutSVGInlineText {#text} at (10,4.41) size 308.42x19.19
           chunk 1 text run 1 at (10.00,20.00) startOffset 0 endOffset 46 width 308.43: "Test single line and multiline text selection."
-      LayoutSVGContainer {g} at (41,82) size 614x366
-        LayoutSVGText {text} at (25,49) size 260x20 contains 1 chunk(s)
-          LayoutSVGInlineText {#text} at (0,0) size 260x20
+      LayoutSVGContainer {g} at (25,49.41) size 367.50x219.19
+        LayoutSVGText {text} at (25,49.41) size 259.19x19.19 contains 1 chunk(s)
+          LayoutSVGInlineText {#text} at (25,49.41) size 259.19x19.19
             chunk 1 text run 1 at (25.00,65.00) startOffset 0 endOffset 37 width 259.20: "Here is a stand-alone 'text' element."
-        LayoutSVGText {text} at (25,74) size 304x20 contains 1 chunk(s)
-          LayoutSVGInlineText {#text} at (0,0) size 304x20
+        LayoutSVGText {text} at (25,74.41) size 303.31x19.19 contains 1 chunk(s)
+          LayoutSVGInlineText {#text} at (25,74.41) size 303.31x19.19
             chunk 1 text run 1 at (25.00,90.00) startOffset 0 endOffset 43 width 303.32: "Here is a second 'text' element just below."
-        LayoutSVGText {text} at (25,99) size 350x20 contains 1 chunk(s)
-          LayoutSVGInlineText {#text} at (0,0) size 350x20
+        LayoutSVGText {text} at (25,99.41) size 349.80x19.19 contains 1 chunk(s)
+          LayoutSVGInlineText {#text} at (25,99.41) size 349.80x19.19
             chunk 1 text run 1 at (25.00,115.00) startOffset 0 endOffset 48 width 349.80: "Because these are four separate 'text' elements,"
-        LayoutSVGText {text} at (25,124) size 333x20 contains 1 chunk(s)
-          LayoutSVGInlineText {#text} at (0,0) size 333x20
+        LayoutSVGText {text} at (25,124.41) size 332.39x19.19 contains 1 chunk(s)
+          LayoutSVGInlineText {#text} at (25,124.41) size 332.39x19.19
             chunk 1 text run 1 at (25.00,140.00) startOffset 0 endOffset 47 width 332.40: "text selection should not go across lines here."
-        LayoutSVGText {text} at (25,174) size 368x95 contains 1 chunk(s)
+        LayoutSVGText {text} at (25,174.41) size 367.50x94.19 contains 1 chunk(s)
           LayoutSVGTSpan {tspan} at (0,0) size 363x20
-            LayoutSVGInlineText {#text} at (0,0) size 363x20
+            LayoutSVGInlineText {#text} at (25,174.41) size 362.70x19.19
               chunk 1 text run 1 at (25.00,190.00) startOffset 0 endOffset 50 width 362.72: "However, these lines of text are achieved by using"
-          LayoutSVGInlineText {#text} at (362,0) size 5x20
+          LayoutSVGInlineText {#text} at (387.70,174.41) size 4.80x19.19
             chunk 1 text run 1 at (387.72,190.00) startOffset 0 endOffset 1 width 4.80: " "
           LayoutSVGTSpan {tspan} at (0,0) size 356x20
-            LayoutSVGInlineText {#text} at (0,25) size 356x20
+            LayoutSVGInlineText {#text} at (25,199.41) size 355.80x19.19
               chunk 1 text run 1 at (25.00,215.00) startOffset 0 endOffset 51 width 355.80: "one 'tspan' per line, all contained within the same"
-          LayoutSVGInlineText {#text} at (355,25) size 5x20
+          LayoutSVGInlineText {#text} at (380.80,199.41) size 4.80x19.19
             chunk 1 text run 1 at (380.80,215.00) startOffset 0 endOffset 1 width 4.80: " "
           LayoutSVGTSpan {tspan} at (0,0) size 351x20
-            LayoutSVGInlineText {#text} at (0,50) size 351x20
+            LayoutSVGInlineText {#text} at (25,224.41) size 351x19.19
               chunk 1 text run 1 at (25.00,240.00) startOffset 0 endOffset 51 width 351.00: "'text' element, so you should be able to select all"
-          LayoutSVGInlineText {#text} at (350,50) size 5x20
+          LayoutSVGInlineText {#text} at (375.98,224.41) size 4.80x19.19
             chunk 1 text run 1 at (376.00,240.00) startOffset 0 endOffset 1 width 4.80: " "
           LayoutSVGTSpan {tspan} at (0,0) size 197x20
-            LayoutSVGInlineText {#text} at (0,75) size 197x20
+            LayoutSVGInlineText {#text} at (25,249.41) size 196.80x19.19
               chunk 1 text run 1 at (25.00,265.00) startOffset 0 endOffset 28 width 196.80: "four lines at the same time."
           LayoutSVGInlineText {#text} at (0,0) size 0x0
-      LayoutSVGText {text} at (10,304) size 266x46 contains 1 chunk(s)
-        LayoutSVGInlineText {#text} at (0,0) size 266x46
+      LayoutSVGText {text} at (10,304) size 265.80x45.59 contains 1 chunk(s)
+        LayoutSVGInlineText {#text} at (10,304) size 265.80x45.59
           chunk 1 text run 1 at (10.00,340.00) startOffset 0 endOffset 16 width 265.80: "$Revision: 1.8 $"
-      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 25 {svg} of document
 selection end:   position 16 of child 0 {#text} of child 5 {text} of child 13 {g} of child 25 {svg} of document