Change SVG layout tree output to be more meaningful and consistent

third_party/WebKit/LayoutTests/platform/mac/svg/custom/text-letter-spacing-expected.txt

Index: third_party/WebKit/LayoutTests/platform/mac/svg/custom/text-letter-spacing-expected.txt
diff --git a/third_party/WebKit/LayoutTests/platform/mac/svg/custom/text-letter-spacing-expected.txt b/third_party/WebKit/LayoutTests/platform/mac/svg/custom/text-letter-spacing-expected.txt
index 2e60c1cf84bdb5c45f43d58ea9ec62f3d69ab545..2775dfb5967f1f7cbd4da1801c1fdf7c93d7d0a6 100644
--- a/third_party/WebKit/LayoutTests/platform/mac/svg/custom/text-letter-spacing-expected.txt
+++ b/third_party/WebKit/LayoutTests/platform/mac/svg/custom/text-letter-spacing-expected.txt
@@ -1,10 +1,10 @@
 layer at (0,0) size 800x600
   LayoutView at (0,0) size 800x600
 layer at (0,0) size 800x600
-  LayoutSVGRoot {svg} at (20,11) size 361x157
-    LayoutSVGContainer {g} at (20,11) size 361x157
-      LayoutSVGText {text} at (10,5) size 181x19 contains 1 chunk(s)
-        LayoutSVGInlineText {#text} at (0,0) size 181x19
+  LayoutSVGRoot {svg} at (0,0) size 800x600
+    LayoutSVGContainer {g} at (10,5.50) size 180.50x78.50
+      LayoutSVGText {text} at (10,5.50) size 180.50x18.50 contains 1 chunk(s)
+        LayoutSVGInlineText {#text} at (10,5.50) size 180.50x18.50
           chunk 1 text run 1 at (10.00,20.00) startOffset 0 endOffset 1 width 11.55: "A"
           chunk 1 text run 2 at (40.45,20.00) startOffset 1 endOffset 2 width 10.67: "B"
           chunk 1 text run 3 at (70.02,20.00) startOffset 2 endOffset 3 width 10.67: "C"
@@ -12,21 +12,21 @@ layer at (0,0) size 800x600
           chunk 1 text run 5 at (122.49,20.00) startOffset 4 endOffset 5 width 11.55: "D"
           chunk 1 text run 6 at (152.94,20.00) startOffset 5 endOffset 6 width 9.77: "E"
           chunk 1 text run 7 at (181.61,20.00) startOffset 6 endOffset 7 width 8.90: "F"
-      LayoutSVGText {text} at (10,25) size 181x19 contains 1 chunk(s)
+      LayoutSVGText {text} at (10,25.50) size 180.50x18.50 contains 1 chunk(s)
         LayoutSVGTSpan {tspan} at (0,0) size 71x19
-          LayoutSVGInlineText {#text} at (0,0) size 71x19
+          LayoutSVGInlineText {#text} at (10,25.50) size 70.69x18.50
             chunk 1 text run 1 at (10.00,40.00) startOffset 0 endOffset 1 width 11.55: "A"
             chunk 1 text run 2 at (40.45,40.00) startOffset 1 endOffset 2 width 10.67: "B"
             chunk 1 text run 3 at (70.02,40.00) startOffset 2 endOffset 3 width 10.67: "C"
-        LayoutSVGInlineText {#text} at (89,0) size 4x19
+        LayoutSVGInlineText {#text} at (99.58,25.50) size 4x18.50
           chunk 1 text run 1 at (99.59,40.00) startOffset 0 endOffset 1 width 4.00: " "
         LayoutSVGTSpan {tspan} at (0,0) size 69x19
-          LayoutSVGInlineText {#text} at (112,0) size 69x19
+          LayoutSVGInlineText {#text} at (122.48,25.50) size 68.02x18.50
             chunk 1 text run 1 at (122.49,40.00) startOffset 0 endOffset 1 width 11.55: "D"
             chunk 1 text run 2 at (152.94,40.00) startOffset 1 endOffset 2 width 9.77: "E"
             chunk 1 text run 3 at (181.61,40.00) startOffset 2 endOffset 3 width 8.90: "F"
-      LayoutSVGText {text} at (10,45) size 129x19 contains 1 chunk(s)
-        LayoutSVGInlineText {#text} at (0,0) size 129x19
+      LayoutSVGText {text} at (10,45.50) size 128.89x18.50 contains 1 chunk(s)
+        LayoutSVGInlineText {#text} at (10,45.50) size 128.89x18.50
           chunk 1 text run 1 at (10.00,60.00) startOffset 0 endOffset 1 width 11.55: "A"
           chunk 1 text run 1 at (30.00,60.00) startOffset 0 endOffset 1 width 10.67: "B"
           chunk 1 text run 1 at (50.00,60.00) startOffset 0 endOffset 1 width 10.67: "C"
@@ -34,16 +34,16 @@ layer at (0,0) size 800x600
           chunk 1 text run 1 at (90.00,60.00) startOffset 0 endOffset 1 width 11.55: "D"
           chunk 1 text run 1 at (110.00,60.00) startOffset 0 endOffset 1 width 9.77: "E"
           chunk 1 text run 1 at (130.00,60.00) startOffset 0 endOffset 1 width 8.90: "F"
-      LayoutSVGText {text} at (10,65) size 129x19 contains 1 chunk(s)
+      LayoutSVGText {text} at (10,65.50) size 128.89x18.50 contains 1 chunk(s)
         LayoutSVGTSpan {tspan} at (0,0) size 51x19
-          LayoutSVGInlineText {#text} at (0,0) size 51x19
+          LayoutSVGInlineText {#text} at (10,65.50) size 50.67x18.50
             chunk 1 text run 1 at (10.00,80.00) startOffset 0 endOffset 1 width 11.55: "A"
             chunk 1 text run 1 at (30.00,80.00) startOffset 0 endOffset 1 width 10.67: "B"
             chunk 1 text run 1 at (50.00,80.00) startOffset 0 endOffset 1 width 10.67: "C"
-        LayoutSVGInlineText {#text} at (60,0) size 4x19
+        LayoutSVGInlineText {#text} at (70,65.50) size 4x18.50
           chunk 1 text run 1 at (70.00,80.00) startOffset 0 endOffset 1 width 4.00: " "
         LayoutSVGTSpan {tspan} at (0,0) size 49x19
-          LayoutSVGInlineText {#text} at (80,0) size 49x19
+          LayoutSVGInlineText {#text} at (90,65.50) size 48.89x18.50
             chunk 1 text run 1 at (90.00,80.00) startOffset 0 endOffset 1 width 11.55: "D"
             chunk 1 text run 1 at (110.00,80.00) startOffset 0 endOffset 1 width 9.77: "E"
             chunk 1 text run 1 at (130.00,80.00) startOffset 0 endOffset 1 width 8.90: "F"