Change SVG layout tree output to be more meaningful and consistent

third_party/WebKit/LayoutTests/svg/custom/mask-with-all-units-expected.txt

Index: third_party/WebKit/LayoutTests/svg/custom/mask-with-all-units-expected.txt
diff --git a/third_party/WebKit/LayoutTests/svg/custom/mask-with-all-units-expected.txt b/third_party/WebKit/LayoutTests/svg/custom/mask-with-all-units-expected.txt
index 3426ff877112788f0c37d8b5b9da02a956be95ba..dca709dcfca0ed9ef5fc6ba369a71913c18c09fc 100644
--- a/third_party/WebKit/LayoutTests/svg/custom/mask-with-all-units-expected.txt
+++ b/third_party/WebKit/LayoutTests/svg/custom/mask-with-all-units-expected.txt
@@ -1,21 +1,21 @@
 layer at (0,0) size 800x600
   LayoutView at (0,0) size 800x600
 layer at (0,0) size 250x250
-  LayoutSVGRoot {svg} at (60,60) size 160x160
+  LayoutSVGRoot {svg} at (0,0) size 250x250
     LayoutSVGHiddenContainer {defs} at (0,0) size 0x0
       LayoutSVGResourceMasker {mask} [id="mask1"] [maskUnits=userSpaceOnUse] [maskContentUnits=userSpaceOnUse]
         LayoutSVGRect {rect} at (60,60) size 50x50 [fill={[type=SOLID] [color=#FFFFFF] [opacity=0.50]}] [x=60.00] [y=60.00] [width=50.00] [height=50.00]
       LayoutSVGResourceMasker {mask} [id="mask2"] [maskUnits=objectBoundingBox] [maskContentUnits=objectBoundingBox]
-        LayoutSVGRect {rect} at (0,0) size 126x1 [fill={[type=SOLID] [color=#FFFFFF] [opacity=0.50]}] [x=0.50] [y=0.50] [width=125.00] [height=0.50]
+        LayoutSVGRect {rect} at (0.50,0.50) size 125x0.50 [fill={[type=SOLID] [color=#FFFFFF] [opacity=0.50]}] [x=0.50] [y=0.50] [width=125.00] [height=0.50]
       LayoutSVGResourceMasker {mask} [id="mask3"] [maskUnits=objectBoundingBox] [maskContentUnits=userSpaceOnUse]
         LayoutSVGRect {rect} at (60,170) size 50x50 [fill={[type=SOLID] [color=#FFFFFF] [opacity=0.50]}] [x=60.00] [y=170.00] [width=50.00] [height=50.00]
       LayoutSVGResourceMasker {mask} [id="mask4"] [maskUnits=userSpaceOnUse] [maskContentUnits=objectBoundingBox]
-        LayoutSVGRect {rect} at (0,0) size 1x1 [fill={[type=SOLID] [color=#FFFFFF] [opacity=0.50]}] [x=0.50] [y=0.50] [width=0.50] [height=0.50]
-    LayoutSVGRect {rect} at (60,60) size 50x50 [fill={[type=SOLID] [color=#008000]}] [x=10.00] [y=10.00] [width=100.00] [height=100.00]
+        LayoutSVGRect {rect} at (0.50,0.50) size 0.50x0.50 [fill={[type=SOLID] [color=#FFFFFF] [opacity=0.50]}] [x=0.50] [y=0.50] [width=0.50] [height=0.50]
+    LayoutSVGRect {rect} at (10,10) size 100x100 [fill={[type=SOLID] [color=#008000]}] [x=10.00] [y=10.00] [width=100.00] [height=100.00]
       [masker="mask1"] LayoutSVGResourceMasker {mask} at (60,60) size 50x50
-    LayoutSVGRect {rect} at (170,60) size 50x50 [fill={[type=SOLID] [color=#008000]}] [x=120.00] [y=10.00] [width=100.00] [height=100.00]
+    LayoutSVGRect {rect} at (120,10) size 100x100 [fill={[type=SOLID] [color=#008000]}] [x=120.00] [y=10.00] [width=100.00] [height=100.00]
       [masker="mask2"] LayoutSVGResourceMasker {mask} at (170,60) size 60x50
-    LayoutSVGRect {rect} at (60,170) size 50x50 [fill={[type=SOLID] [color=#008000]}] [x=10.00] [y=120.00] [width=100.00] [height=100.00]
+    LayoutSVGRect {rect} at (10,120) size 100x100 [fill={[type=SOLID] [color=#008000]}] [x=10.00] [y=120.00] [width=100.00] [height=100.00]
       [masker="mask3"] LayoutSVGResourceMasker {mask} at (60,170) size 50x50
-    LayoutSVGRect {rect} at (170,170) size 50x50 [fill={[type=SOLID] [color=#008000]}] [x=120.00] [y=120.00] [width=100.00] [height=100.00]
+    LayoutSVGRect {rect} at (120,120) size 100x100 [fill={[type=SOLID] [color=#008000]}] [x=120.00] [y=120.00] [width=100.00] [height=100.00]
       [masker="mask4"] LayoutSVGResourceMasker {mask} at (170,170) size 50x50