Change SVG layout tree output to be more meaningful and consistent

third_party/WebKit/LayoutTests/svg/custom/empty-merge-expected.txt

Index: third_party/WebKit/LayoutTests/svg/custom/empty-merge-expected.txt
diff --git a/third_party/WebKit/LayoutTests/svg/custom/empty-merge-expected.txt b/third_party/WebKit/LayoutTests/svg/custom/empty-merge-expected.txt
index db8e292ab6a59408db82e0245ab13ba59ae01464..1788df6694981df7d4e8bf59d41c32c83fe6e495 100644
--- a/third_party/WebKit/LayoutTests/svg/custom/empty-merge-expected.txt
+++ b/third_party/WebKit/LayoutTests/svg/custom/empty-merge-expected.txt
@@ -1,7 +1,7 @@
 layer at (0,0) size 800x600
   LayoutView at (0,0) size 800x600
 layer at (0,0) size 800x600
-  LayoutSVGRoot {svg} at (0,0) size 240x120
+  LayoutSVGRoot {svg} at (0,0) size 800x600
     LayoutSVGHiddenContainer {defs} at (0,0) size 0x0
       LayoutSVGResourceFilter {filter} [id="MyFilter1"] [filterUnits=objectBoundingBox] [primitiveUnits=userSpaceOnUse]
         [feMerge mergeNodes="1"]
@@ -10,7 +10,7 @@ layer at (0,0) size 800x600
         [feMerge mergeNodes="1"]
           [feOffset dx="0.00" dy="0.00"]
             [SourceGraphic]
-    LayoutSVGRect {rect} at (0,0) size 120x120 [fill={[type=SOLID] [color=#008000]}] [x=10.00] [y=10.00] [width=100.00] [height=100.00]
+    LayoutSVGRect {rect} at (10,10) size 100x100 [fill={[type=SOLID] [color=#008000]}] [x=10.00] [y=10.00] [width=100.00] [height=100.00]
       [filter="MyFilter1"] LayoutSVGResourceFilter {filter} at (0,0) size 120x120
-    LayoutSVGRect {rect} at (120,0) size 120x120 [fill={[type=SOLID] [color=#008000]}] [x=130.00] [y=10.00] [width=100.00] [height=100.00]
+    LayoutSVGRect {rect} at (130,10) size 100x100 [fill={[type=SOLID] [color=#008000]}] [x=130.00] [y=10.00] [width=100.00] [height=100.00]
       [filter="MyFilter2"] LayoutSVGResourceFilter {filter} at (120,0) size 120x120