Change SVG layout tree output to be more meaningful and consistent

third_party/WebKit/LayoutTests/platform/mac/svg/custom/pattern-rotate-expected.txt

 layer at (0,0) size 800x600
   LayoutView at (0,0) size 800x600
 layer at (0,0) size 800x600
-  LayoutSVGRoot {svg} at (10,19) size 296x214
-    LayoutSVGHiddenContainer {defs} at (0,0) size 0x0
+  LayoutSVGRoot {svg} at (0,0) size 800x600
+    LayoutSVGHiddenContainer {defs} at (0,0) size 100x100
       LayoutSVGResourcePattern {pattern} [id="simpledots"] [patternUnits=objectBoundingBox] [patternContentUnits=objectBoundingBox]
-        LayoutSVGEllipse {circle} at (0,0) size 1x1 [fill={[type=SOLID] [color=#FF0000]}] [cx=0.25] [cy=0.25] [r=0.15]
-        LayoutSVGEllipse {circle} at (0,0) size 1x1 [fill={[type=SOLID] [color=#008000]}] [cx=0.75] [cy=0.25] [r=0.15]
-        LayoutSVGEllipse {circle} at (0,0) size 1x1 [fill={[type=SOLID] [color=#0000FF]}] [cx=0.25] [cy=0.75] [r=0.15]
-        LayoutSVGEllipse {circle} at (0,0) size 1x1 [fill={[type=SOLID] [color=#800080]}] [cx=0.75] [cy=0.75] [r=0.15]
-        LayoutSVGEllipse {circle} at (0,0) size 1x1 [fill={[type=SOLID] [color=#FFA500]}] [cx=0.50] [cy=0.50] [r=0.05]
-      LayoutSVGContainer {g} at (0,0) size 101x101
-        LayoutSVGRect {rect} at (0,0) size 101x101 [stroke={[type=SOLID] [color=#000000]}] [fill={[type=PATTERN] [id="simpledots"]}] [x=0.00] [y=0.00] [width=100.00] [height=100.00]
-    LayoutSVGContainer {g} at (37,19) size 135x135 [transform={m=((1.00,0.00)(0.00,1.00)) t=(80.00,20.00)}]
-      LayoutSVGContainer {use} at (37,19) size 135x135 [transform={m=((0.91,0.42)(-0.42,0.91)) t=(0.00,0.00)}]
-        LayoutSVGContainer {g} at (37,19) size 135x135
-          LayoutSVGRect {rect} at (37,19) size 135x135 [stroke={[type=SOLID] [color=#000000]}] [fill={[type=PATTERN] [id="simpledots"]}] [x=0.00] [y=0.00] [width=100.00] [height=100.00]
-    LayoutSVGContainer {g} at (10,189) size 296x44 [transform={m=((1.00,0.00)(0.00,1.00)) t=(10.00,200.00)}]
-      LayoutSVGText {text} at (0,-11) size 296x44 contains 1 chunk(s)
+        LayoutSVGEllipse {circle} at (0.10,0.10) size 0.30x0.30 [fill={[type=SOLID] [color=#FF0000]}] [cx=0.25] [cy=0.25] [r=0.15]
+        LayoutSVGEllipse {circle} at (0.60,0.10) size 0.30x0.30 [fill={[type=SOLID] [color=#008000]}] [cx=0.75] [cy=0.25] [r=0.15]
+        LayoutSVGEllipse {circle} at (0.10,0.60) size 0.30x0.30 [fill={[type=SOLID] [color=#0000FF]}] [cx=0.25] [cy=0.75] [r=0.15]
+        LayoutSVGEllipse {circle} at (0.60,0.60) size 0.30x0.30 [fill={[type=SOLID] [color=#800080]}] [cx=0.75] [cy=0.75] [r=0.15]
+        LayoutSVGEllipse {circle} at (0.45,0.45) size 0.10x0.10 [fill={[type=SOLID] [color=#FFA500]}] [cx=0.50] [cy=0.50] [r=0.05]
+      LayoutSVGContainer {g} at (0,0) size 100x100
+        LayoutSVGRect {rect} at (0,0) size 100x100 [stroke={[type=SOLID] [color=#000000]}] [fill={[type=PATTERN] [id="simpledots"]}] [x=0.00] [y=0.00] [width=100.00] [height=100.00]
+    LayoutSVGContainer {g} at (-42.26,0) size 132.89x132.89 [transform={m=((1.00,0.00)(0.00,1.00)) t=(80.00,20.00)}]
+      LayoutSVGContainer {use} at (0,0) size 100x100 [transform={m=((0.91,0.42)(-0.42,0.91)) t=(0.00,0.00)}]
+        LayoutSVGContainer {g} at (0,0) size 100x100
+          LayoutSVGRect {rect} at (0,0) size 100x100 [stroke={[type=SOLID] [color=#000000]}] [fill={[type=PATTERN] [id="simpledots"]}] [x=0.00] [y=0.00] [width=100.00] [height=100.00]
+    LayoutSVGContainer {g} at (0,-11) size 295.23x44 [transform={m=((1.00,0.00)(0.00,1.00)) t=(10.00,200.00)}]
+      LayoutSVGText {text} at (0,-11) size 295.23x44 contains 1 chunk(s)
         LayoutSVGTSpan {tspan} at (0,0) size 289x14
-          LayoutSVGInlineText {#text} at (0,0) size 289x14
+          LayoutSVGInlineText {#text} at (0,-11) size 288.05x14
             chunk 1 text run 1 at (0.00,0.00) startOffset 0 endOffset 40 width 288.05: "For this test case to be successful, the"
-        LayoutSVGInlineText {#text} at (288,0) size 8x14
+        LayoutSVGInlineText {#text} at (288.05,-11) size 7.19x14
           chunk 1 text run 1 at (288.05,0.00) startOffset 0 endOffset 1 width 7.20: " "
         LayoutSVGTSpan {tspan} at (0,0) size 281x14
-          LayoutSVGInlineText {#text} at (0,15) size 281x14
+          LayoutSVGInlineText {#text} at (0,4) size 280.84x14
             chunk 1 text run 1 at (0.00,15.00) startOffset 0 endOffset 39 width 280.85: "five dots should fit in the rectangle. "
         LayoutSVGInlineText {#text} at (0,0) size 0x0
         LayoutSVGTSpan {tspan} at (0,0) size 65x14
-          LayoutSVGInlineText {#text} at (0,30) size 65x14
+          LayoutSVGInlineText {#text} at (0,19) size 64.80x14
             chunk 1 text run 1 at (0.00,30.00) startOffset 0 endOffset 9 width 64.81: "Bug 14924"
         LayoutSVGInlineText {#text} at (0,0) size 0x0