Change SVG layout tree output to be more meaningful and consistent

third_party/WebKit/LayoutTests/platform/mac/compositing/overflow/accelerated-scrolling-with-clip-path-text-expected.txt

Index: third_party/WebKit/LayoutTests/platform/mac/compositing/overflow/accelerated-scrolling-with-clip-path-text-expected.txt
diff --git a/third_party/WebKit/LayoutTests/platform/mac/compositing/overflow/accelerated-scrolling-with-clip-path-text-expected.txt b/third_party/WebKit/LayoutTests/platform/mac/compositing/overflow/accelerated-scrolling-with-clip-path-text-expected.txt
index 37a87c99f5bee0f8ae73ef2fa8bc55c90e45e07c..3669b1f93c5067ef60ec4e007deaf7e80c596621 100644
--- a/third_party/WebKit/LayoutTests/platform/mac/compositing/overflow/accelerated-scrolling-with-clip-path-text-expected.txt
+++ b/third_party/WebKit/LayoutTests/platform/mac/compositing/overflow/accelerated-scrolling-with-clip-path-text-expected.txt
@@ -6,11 +6,11 @@ layer at (0,0) size 800x434
       LayoutBlockFlow (anonymous) at (0,0) size 784x18
         LayoutText {#text} at (0,0) size 579x18
           text run at (0,0) width 579: "This tests that reference clip-path with text is correctly applied with composited scrolling. "
-        LayoutSVGRoot {svg} at (586,22) size 1x0
+        LayoutSVGRoot {svg} at (578.50,14) size 0x0
           LayoutSVGHiddenContainer {defs} at (0,0) size 0x0
             LayoutSVGResourceClipper {clipPath} [id="clipping"] [clipPathUnits=userSpaceOnUse]
-              LayoutSVGText {text} at (100,66) size 144x69 contains 1 chunk(s)
-                LayoutSVGInlineText {#text} at (0,0) size 144x69
+              LayoutSVGText {text} at (100,66) size 143.34x69 contains 1 chunk(s)
+                LayoutSVGInlineText {#text} at (100,66) size 143.34x69
                   chunk 1 text run 1 at (100.00,120.00) startOffset 0 endOffset 4 width 143.35: "CLIP"
         LayoutText {#text} at (0,0) size 0x0
 layer at (8,26) size 400x400 clip at (8,26) size 385x385 scrollWidth 500 scrollHeight 700