Change SVG layout tree output to be more meaningful and consistent

third_party/WebKit/LayoutTests/platform/linux/svg/batik/text/textFeatures-expected.txt

Index: third_party/WebKit/LayoutTests/platform/linux/svg/batik/text/textFeatures-expected.txt
diff --git a/third_party/WebKit/LayoutTests/platform/linux/svg/batik/text/textFeatures-expected.txt b/third_party/WebKit/LayoutTests/platform/linux/svg/batik/text/textFeatures-expected.txt
index 07ede17cc25ed33a27309ba86313a620f3318683..18ba7d8089362c23dbc535dfb6c52aa37c64d61a 100644
--- a/third_party/WebKit/LayoutTests/platform/linux/svg/batik/text/textFeatures-expected.txt
+++ b/third_party/WebKit/LayoutTests/platform/linux/svg/batik/text/textFeatures-expected.txt
@@ -1,163 +1,163 @@
 layer at (0,0) size 800x600
   LayoutView at (0,0) size 800x600
 layer at (0,0) size 450x500
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+  LayoutSVGRoot {svg} at (0,0) size 450x500
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         [feGaussianBlur stdDeviation="2.00, 2.00"]
           [SourceGraphic]
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