Change SVG layout tree output to be more meaningful and consistent

third_party/WebKit/LayoutTests/platform/win/svg/text/bbox-with-glyph-overflow-expected.txt

 layer at (0,0) size 800x600
   LayoutView at (0,0) size 800x600
 layer at (0,0) size 800x538
   LayoutBlockFlow {HTML} at (0,0) size 800x538
     LayoutBlockFlow {BODY} at (8,8) size 784x522
       LayoutText {#text} at (0,0) size 272x17
         text run at (0,0) width 272: "No glyphs should extend outside the rects."
       LayoutBR {BR} at (271,0) size 1x17
-      LayoutSVGRoot {svg} at (45,30) size 301x487
-        LayoutSVGText {text} at (41,5) size 130x56 contains 1 chunk(s)
-          LayoutSVGInlineText {#text} at (0,0) size 130x56
+      LayoutSVGRoot {svg} at (0,18) size 700x500
+        LayoutSVGText {text} at (41,5) size 129.23x56 contains 1 chunk(s)
+          LayoutSVGInlineText {#text} at (41,5) size 129.23x56
             chunk 1 text run 1 at (50.00,50.00) startOffset 0 endOffset 8 width 111.13: "ffffffff"
-        LayoutSVGText {text} at (41,105) size 185x56 contains 1 chunk(s)
-          LayoutSVGInlineText {#text} at (0,0) size 102x56
+        LayoutSVGText {text} at (41,105) size 184.80x56 contains 1 chunk(s)
+          LayoutSVGInlineText {#text} at (41,105) size 101.45x56
             chunk 1 text run 1 at (50.00,150.00) startOffset 0 endOffset 6 width 83.35: "ffffff"
           LayoutSVGTSpan {tspan} at (0,0) size 102x56
-            LayoutSVGInlineText {#text} at (83,0) size 102x56
+            LayoutSVGInlineText {#text} at (124.34,105) size 101.45x56
               chunk 1 text run 1 at (133.35,150.00) startOffset 0 endOffset 6 width 83.35: "ffffff"
-        LayoutSVGText {text} at (45,179) size 205x88 contains 1 chunk(s)
+        LayoutSVGText {text} at (45,179) size 204.13x88 contains 1 chunk(s)
           LayoutSVGTSpan {tspan} at (0,0) size 61x33
-            LayoutSVGInlineText {#text} at (0,44) size 61x33
+            LayoutSVGInlineText {#text} at (45,223) size 60.67x33
               chunk 1 text run 1 at (50.00,250.00) startOffset 0 endOffset 6 width 50.01: "ffffff"
           LayoutSVGTSpan {tspan} at (0,0) size 164x88
-            LayoutSVGInlineText {#text} at (41,0) size 164x88
+            LayoutSVGInlineText {#text} at (86,179) size 163.13x88
               chunk 1 text run 1 at (100.01,250.00) startOffset 0 endOffset 6 width 133.36: "ffffff"
-        LayoutSVGText {text} at (37,299) size 301x102 contains 1 chunk(s)
-          LayoutSVGInlineText {#text} at (0,0) size 300x101
+        LayoutSVGText {text} at (37.77,299.84) size 299.28x100.30 contains 1 chunk(s)
+          LayoutSVGInlineText {#text} at (37.77,299.84) size 299.28x100.30
             chunk 1 text run 1 at (50.00,350.00) startOffset 0 endOffset 1 width 13.89: "f"
             chunk 1 text run 2 at (63.89,350.00) startOffset 1 endOffset 2 width 13.89: "f"
             chunk 1 text run 3 at (77.78,350.00) startOffset 2 endOffset 3 width 13.89: "f"
             chunk 1 text run 4 at (91.67,350.00) startOffset 3 endOffset 4 width 13.89: "f"
             chunk 1 text run 5 at (105.57,350.00) startOffset 4 endOffset 5 width 13.89: "f"
             chunk 1 text run 6 at (119.46,350.00) startOffset 5 endOffset 6 width 13.89: "f"
             chunk 1 text run 7 at (133.35,350.00) startOffset 6 endOffset 7 width 13.89: "f"
             chunk 1 text run 8 at (147.24,350.00) startOffset 7 endOffset 8 width 13.89: "f"
             chunk 1 text run 9 at (161.13,350.00) startOffset 8 endOffset 9 width 13.89: "f"
             chunk 1 text run 10 at (175.02,350.00) startOffset 9 endOffset 10 width 13.89: "f"
             chunk 1 text run 11 at (188.92,350.00) startOffset 10 endOffset 11 width 13.89: "f"
             chunk 1 text run 12 at (202.81,350.00) startOffset 11 endOffset 12 width 13.89: "f"
             chunk 1 text run 13 at (216.70,350.00) startOffset 12 endOffset 13 width 13.89: "f"
             chunk 1 text run 14 at (230.59,350.00) startOffset 13 endOffset 14 width 13.89: "f"
             chunk 1 text run 15 at (244.48,350.00) startOffset 14 endOffset 15 width 13.89: "f"
             chunk 1 text run 16 at (258.37,350.00) startOffset 15 endOffset 16 width 13.89: "f"
             chunk 1 text run 17 at (272.27,350.00) startOffset 16 endOffset 17 width 13.89: "f"
             chunk 1 text run 18 at (286.16,350.00) startOffset 17 endOffset 18 width 13.89: "f"
             chunk 1 text run 19 at (300.05,350.00) startOffset 18 endOffset 19 width 13.89: "f"
-        LayoutSVGText {text} at (50,420) size 134x70 contains 1 chunk(s)
-          LayoutSVGInlineText {#text} at (0,0) size 134x70
+        LayoutSVGText {text} at (50,420) size 133.64x70 contains 1 chunk(s)
+          LayoutSVGInlineText {#text} at (50,420) size 133.64x70
             chunk 1 text run 1 at (50.00,475.00) startOffset 0 endOffset 5 width 133.64: "'faQ'"
-        LayoutSVGRect {rect} at (48,30) size 131x58 [stroke={[type=SOLID] [color=#008000]}] [fill={[type=SOLID] [color=#00000000]}] [x=41.00] [y=5.00] [width=129.23] [height=56.00]
-        LayoutSVGRect {rect} at (48,130) size 187x58 [stroke={[type=SOLID] [color=#008000]}] [fill={[type=SOLID] [color=#00000000]}] [x=41.00] [y=105.00] [width=184.80] [height=56.00]
-        LayoutSVGRect {rect} at (52,204) size 206x90 [stroke={[type=SOLID] [color=#008000]}] [fill={[type=SOLID] [color=#00000000]}] [x=45.00] [y=179.00] [width=204.13] [height=88.00]
-        LayoutSVGRect {rect} at (45,325) size 301x102 [stroke={[type=SOLID] [color=#008000]}] [fill={[type=SOLID] [color=#00000000]}] [x=37.77] [y=299.84] [width=299.28] [height=100.30]
-        LayoutSVGRect {rect} at (57,445) size 136x72 [stroke={[type=SOLID] [color=#008000]}] [fill={[type=SOLID] [color=#00000000]}] [x=50.00] [y=420.00] [width=133.64] [height=70.00]
+        LayoutSVGRect {rect} at (41,5) size 129.23x56 [stroke={[type=SOLID] [color=#008000]}] [fill={[type=SOLID] [color=#00000000]}] [x=41.00] [y=5.00] [width=129.23] [height=56.00]
+        LayoutSVGRect {rect} at (41,105) size 184.80x56 [stroke={[type=SOLID] [color=#008000]}] [fill={[type=SOLID] [color=#00000000]}] [x=41.00] [y=105.00] [width=184.80] [height=56.00]
+        LayoutSVGRect {rect} at (45,179) size 204.13x88 [stroke={[type=SOLID] [color=#008000]}] [fill={[type=SOLID] [color=#00000000]}] [x=45.00] [y=179.00] [width=204.13] [height=88.00]
+        LayoutSVGRect {rect} at (37.77,299.84) size 299.28x100.30 [stroke={[type=SOLID] [color=#008000]}] [fill={[type=SOLID] [color=#00000000]}] [x=37.77] [y=299.84] [width=299.28] [height=100.30]
+        LayoutSVGRect {rect} at (50,420) size 133.64x70 [stroke={[type=SOLID] [color=#008000]}] [fill={[type=SOLID] [color=#00000000]}] [x=50.00] [y=420.00] [width=133.64] [height=70.00]
       LayoutText {#text} at (0,0) size 0x0
       LayoutText {#text} at (0,0) size 0x0