Change SVG layout tree output to be more meaningful and consistent

third_party/WebKit/LayoutTests/platform/win/svg/text/text-selection-deco-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 (16,9) size 638x459
-      LayoutSVGText {text} at (10,5) size 151x19 contains 1 chunk(s)
-        LayoutSVGInlineText {#text} at (0,0) size 151x18
+    LayoutSVGContainer {g} at (10,5.61) size 381.45x274.19
+      LayoutSVGText {text} at (10,5.61) size 150.14x18 contains 1 chunk(s)
+        LayoutSVGInlineText {#text} at (10,5.61) size 150.14x18
           chunk 1 text run 1 at (10.00,20.00) startOffset 0 endOffset 23 width 150.14: "Test 'text-decoration'."
-      LayoutSVGContainer {g} at (40,71) size 614x397
-        LayoutSVGText {text} at (25,43) size 123x27 contains 1 chunk(s)
-          LayoutSVGInlineText {#text} at (0,0) size 123x27
+      LayoutSVGContainer {g} at (25,43.41) size 366.45x236.39
+        LayoutSVGText {text} at (25,43.41) size 122.69x26.39 contains 1 chunk(s)
+          LayoutSVGInlineText {#text} at (25,43.41) size 122.69x26.39
             chunk 1 text run 1 at (25.00,65.00) startOffset 0 endOffset 11 width 122.70: "Normal text"
-        LayoutSVGText {text} at (25,113) size 227x27 contains 1 chunk(s)
-          LayoutSVGInlineText {#text} at (0,0) size 227x27
+        LayoutSVGText {text} at (25,113.41) size 226.78x26.39 contains 1 chunk(s)
+          LayoutSVGInlineText {#text} at (25,113.41) size 226.78x26.39
             chunk 1 text run 1 at (25.00,135.00) startOffset 0 endOffset 22 width 226.78: "Text with line-through"
-        LayoutSVGText {text} at (25,183) size 162x27 contains 1 chunk(s)
-          LayoutSVGInlineText {#text} at (0,0) size 162x27
+        LayoutSVGText {text} at (25,183.41) size 161.42x26.39 contains 1 chunk(s)
+          LayoutSVGInlineText {#text} at (25,183.41) size 161.42x26.39
             chunk 1 text run 1 at (25.00,205.00) startOffset 0 endOffset 15 width 161.43: "Underlined text"
-        LayoutSVGText {text} at (25,253) size 367x27 contains 1 chunk(s)
+        LayoutSVGText {text} at (25,253.41) size 366.45x26.39 contains 1 chunk(s)
           LayoutSVGTSpan {tspan} at (0,0) size 46x27
-            LayoutSVGInlineText {#text} at (0,0) size 46x27
+            LayoutSVGInlineText {#text} at (25,253.41) size 45.36x26.39
               chunk 1 text run 1 at (25.00,275.00) startOffset 0 endOffset 3 width 45.36: "One"
-          LayoutSVGInlineText {#text} at (45,0) size 7x27
+          LayoutSVGInlineText {#text} at (70.36,253.41) size 6.66x26.39
             chunk 1 text run 1 at (70.36,275.00) startOffset 0 endOffset 1 width 6.67: " "
           LayoutSVGTSpan {tspan} at (0,0) size 54x27
-            LayoutSVGInlineText {#text} at (51,0) size 53x27
+            LayoutSVGInlineText {#text} at (76.42,253.41) size 52.61x26.39
               chunk 1 text run 1 at (77.03,275.00) startOffset 0 endOffset 4 width 52.02: "word"
-          LayoutSVGInlineText {#text} at (104,0) size 7x27
+          LayoutSVGInlineText {#text} at (129.05,253.41) size 6.66x26.39
             chunk 1 text run 1 at (129.05,275.00) startOffset 0 endOffset 1 width 6.67: " "
           LayoutSVGTSpan {tspan} at (0,0) size 40x27
-            LayoutSVGInlineText {#text} at (110,0) size 39x27
+            LayoutSVGInlineText {#text} at (135.72,253.41) size 38.69x26.39
               chunk 1 text run 1 at (135.72,275.00) startOffset 0 endOffset 3 width 38.70: "has"
-          LayoutSVGInlineText {#text} at (149,0) size 7x27
+          LayoutSVGInlineText {#text} at (174.41,253.41) size 6.66x26.39
             chunk 1 text run 1 at (174.41,275.00) startOffset 0 endOffset 1 width 6.67: " "
           LayoutSVGTSpan {tspan} at (0,0) size 87x27
-            LayoutSVGInlineText {#text} at (156,0) size 87x27
+            LayoutSVGInlineText {#text} at (181.08,253.41) size 86.28x26.39
               chunk 1 text run 1 at (181.08,275.00) startOffset 0 endOffset 9 width 86.29: "different"
-          LayoutSVGInlineText {#text} at (242,0) size 7x27
+          LayoutSVGInlineText {#text} at (267.36,253.41) size 6.66x26.39
             chunk 1 text run 1 at (267.37,275.00) startOffset 0 endOffset 1 width 6.67: " "
           LayoutSVGTSpan {tspan} at (0,0) size 118x27
-            LayoutSVGInlineText {#text} at (249,0) size 118x27
+            LayoutSVGInlineText {#text} at (274.03,253.41) size 117.42x26.39
               chunk 1 text run 1 at (274.04,275.00) startOffset 0 endOffset 11 width 117.42: "underlining"
           LayoutSVGInlineText {#text} at (0,0) size 0x0
-    LayoutSVGText {text} at (10,304) size 264x45 contains 1 chunk(s)
-      LayoutSVGInlineText {#text} at (0,0) size 264x44
+    LayoutSVGText {text} at (10,304.61) size 263.31x43.80 contains 1 chunk(s)
+      LayoutSVGInlineText {#text} at (10,304.61) size 263.31x43.80
         chunk 1 text run 1 at (10.00,340.00) startOffset 0 endOffset 16 width 263.31: "$Revision: 1.9 $"
-    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 14 {svg} of document
 selection end:   position 16 of child 0 {#text} of child 15 {text} of child 14 {svg} of document