Change SVG layout tree output to be more meaningful and consistent

third_party/WebKit/LayoutTests/platform/linux/svg/custom/text-match-highlight-expected.txt

 layer at (0,0) size 800x600
   LayoutView at (0,0) size 800x600
 layer at (0,0) size 800x401
   LayoutBlockFlow {HTML} at (0,0) size 800x401
     LayoutBlockFlow {BODY} at (8,8) size 784x385
       LayoutText {#text} at (0,0) size 424x19
         text run at (0,0) width 424: "Test for crbug.com/56580: There should be 9 highlighted instances of \""
       LayoutInline {SPAN} at (0,0) size 41x19
         LayoutText {#text} at (423,0) size 41x19
           text run at (423,0) width 41: "findme"
@@ skipping 19 matching lines @@
         text run at (284,40) width 42: " lorum."
       LayoutBR {BR} at (326,40) size 0x19
       LayoutText {#text} at (0,60) size 47x19
         text run at (0,60) width 47: "longtext"
       LayoutInline {SPAN} at (0,0) size 40x19
         LayoutText {#text} at (47,60) size 40x19
           text run at (47,60) width 40: "findme"
       LayoutText {#text} at (87,60) size 41x19
         text run at (87,60) width 41: "noyou."
       LayoutBR {BR} at (128,60) size 0x19
-      LayoutSVGRoot {svg} at (17,122) size 218x162
-        LayoutSVGHiddenContainer {defs} at (0,0) size 0x0
-          LayoutSVGPath {path} at (108,88) size 350x300 [fill={[type=SOLID] [color=#000000]}] [data="M 100 200 C 200 100 300 0 400 100 C 500 200 600 300 700 200 C 800 100 900 100 900 100"]
+      LayoutSVGRoot {svg} at (0,80) size 450x300
+        LayoutSVGHiddenContainer {defs} at (100,0) size 800x300
+          LayoutSVGPath {path} at (100,0) size 800x300 [fill={[type=SOLID] [color=#000000]}] [data="M 100 200 C 200 100 300 0 400 100 C 500 200 600 300 700 200 C 800 100 900 100 900 100"]
         LayoutSVGText {text} at (10,35) size 216x19 contains 1 chunk(s)
-          LayoutSVGInlineText {#text} at (0,0) size 216x19
+          LayoutSVGInlineText {#text} at (10,35) size 216x19
             chunk 1 text run 1 at (10.00,50.00) startOffset 0 endOffset 36 width 216.00: "Can you findme in this stroked text?"
         LayoutSVGText {text} at (10,91) size 138x12 contains 1 chunk(s)
-          LayoutSVGInlineText {#text} at (0,0) size 138x12
+          LayoutSVGInlineText {#text} at (10,91) size 138x12
             chunk 1 text run 1 at (10.00,100.00) startOffset 0 endOffset 23 width 138.00: "Findme in a typewriter!"
-        LayoutSVGContainer {g} at (28,212) size 202x72 [transform={m=((0.30,0.00)(0.00,0.30)) t=(0.00,120.00)}]
-          LayoutSVGText {text} at (69,14) size 669x239 contains 1 chunk(s)
+        LayoutSVGContainer {g} at (69.42,14.69) size 668x237.47 [transform={m=((0.30,0.00)(0.00,0.30)) t=(0.00,120.00)}]
+          LayoutSVGText {text} at (69.42,14.69) size 668x237.47 contains 1 chunk(s)
             LayoutSVGTextPath {textPath} at (0,0) size 668x238
-              LayoutSVGInlineText {#text} at (0,0) size 668x238
+              LayoutSVGInlineText {#text} at (69.42,14.69) size 668x237.47
                 chunk 1 text run 1 at (109.48,190.53) startOffset 0 endOffset 1 width 26.67: "F"
                 chunk 1 text run 2 at (122.51,177.58) startOffset 1 endOffset 2 width 10.00: "i"
                 chunk 1 text run 3 at (135.54,164.79) startOffset 2 endOffset 3 width 26.67: "n"
                 chunk 1 text run 4 at (154.83,146.39) startOffset 3 endOffset 4 width 26.67: "d"
                 chunk 1 text run 5 at (178.39,125.17) startOffset 4 endOffset 5 width 36.67: "m"
                 chunk 1 text run 6 at (202.97,105.11) startOffset 5 endOffset 6 width 26.67: "e"
                 chunk 1 text run 7 at (220.55,92.43) startOffset 6 endOffset 7 width 16.67: " "
                 chunk 1 text run 8 at (238.92,80.94) startOffset 7 endOffset 8 width 26.67: "o"
                 chunk 1 text run 9 at (262.81,69.16) startOffset 8 endOffset 9 width 26.67: "n"
                 chunk 1 text run 10 at (283.32,62.32) startOffset 9 endOffset 10 width 16.67: " "
@@ skipping 15 matching lines @@
                 chunk 1 text run 26 at (579.15,236.56) startOffset 25 endOffset 26 width 16.67: " "
                 chunk 1 text run 27 at (595.34,240.13) startOffset 26 endOffset 27 width 16.67: "f"
                 chunk 1 text run 28 at (608.61,241.36) startOffset 27 endOffset 28 width 10.00: "i"
                 chunk 1 text run 29 at (626.88,240.37) startOffset 28 endOffset 29 width 26.67: "n"
                 chunk 1 text run 30 at (652.52,233.25) startOffset 29 endOffset 30 width 26.67: "d"
                 chunk 1 text run 31 at (679.87,217.49) startOffset 30 endOffset 31 width 36.67: "m"
                 chunk 1 text run 32 at (703.66,196.38) startOffset 31 endOffset 32 width 26.67: "e"
                 chunk 1 text run 33 at (722.07,179.48) startOffset 32 endOffset 33 width 23.33: "?"
             LayoutSVGInlineText {#text} at (0,0) size 0x0
       LayoutText {#text} at (0,0) size 0x0