Support subpixel layout for borders.

third_party/WebKit/LayoutTests/platform/mac/svg/zoom/page/zoom-svg-float-border-padding-expected.txt

Index: third_party/WebKit/LayoutTests/platform/mac/svg/zoom/page/zoom-svg-float-border-padding-expected.txt
diff --git a/third_party/WebKit/LayoutTests/platform/mac/svg/zoom/page/zoom-svg-float-border-padding-expected.txt b/third_party/WebKit/LayoutTests/platform/mac/svg/zoom/page/zoom-svg-float-border-padding-expected.txt
index 3cbf8ebf4d2d417600904c3fc9d4f6fcd2e1d6f8..c9ad1194396aba5a172ce03c07e31e8a6e639719 100644
--- a/third_party/WebKit/LayoutTests/platform/mac/svg/zoom/page/zoom-svg-float-border-padding-expected.txt
+++ b/third_party/WebKit/LayoutTests/platform/mac/svg/zoom/page/zoom-svg-float-border-padding-expected.txt
@@ -1,8 +1,8 @@
-layer at (0,0) size 800x600 clip at (0,0) size 785x600 scrollHeight 767
+layer at (0,0) size 800x600 clip at (0,0) size 785x600 scrollHeight 769
   LayoutView at (0,0) size 800x600
-layer at (0,0) size 785x767 backgroundClip at (0,0) size 785x600 clip at (0,0) size 785x600
-  LayoutBlockFlow {html} at (0,0) size 785x766.84
-    LayoutBlockFlow {body} at (11.52,11.52) size 761.97x732.30
+layer at (0,0) size 785x769 backgroundClip at (0,0) size 785x600 clip at (0,0) size 785x600
+  LayoutBlockFlow {html} at (0,0) size 785x769.28
+    LayoutBlockFlow {body} at (11.52,11.52) size 761.97x734.73
       LayoutBlockFlow (anonymous) at (0,0) size 761.97x52
         LayoutText {#text} at (0,0) size 749x52
           text run at (0,0) width 353: "The two blocks should look identical. "
@@ -11,17 +11,17 @@ layer at (0,0) size 785x767 backgroundClip at (0,0) size 785x600 clip at (0,0) s
       LayoutBlockFlow {p} at (0,75.03) size 761.97x26
         LayoutText {#text} at (0,0) size 518x26
           text run at (0,0) width 518: "There should be a red, white and blue pattern below this"
-      LayoutSVGRoot (floating) {svg} at (14.39,138.45) size 200.78x200.78
+      LayoutSVGRoot (floating) {svg} at (14.39,138.45) size 201.56x201.56
         LayoutSVGRect {rect} at (0,0) size 100x100 [fill={[type=SOLID] [color=#0000FF]}] [x=0.00] [y=0.00] [width=100.00] [height=100.00]
-      LayoutBlockFlow {p} at (0,353.63) size 761.97x26
+      LayoutBlockFlow {p} at (0,354.41) size 761.97x26
         LayoutText {#text} at (0,0) size 517x26
           text run at (0,0) width 517: "There should be a red, white and blue pattern above this"
-      LayoutBlockFlow {hr} at (0,402.66) size 761.97x2 [border: (1px inset #EEEEEE)]
-      LayoutBlockFlow {p} at (0,427.69) size 761.97x26
+      LayoutBlockFlow {hr} at (0,403.44) size 761.97x2.88 [border: (1.44px inset #EEEEEE)]
+      LayoutBlockFlow {p} at (0,429.34) size 761.97x26
         LayoutText {#text} at (0,0) size 518x26
           text run at (0,0) width 518: "There should be a red, white and blue pattern below this"
-      LayoutBlockFlow (floating) {div} at (14.39,491.11) size 200.80x200.80 [border: (14px solid #FF0000)]
-        LayoutBlockFlow {div} at (28.39,28.39) size 144x144 [bgcolor=#0000FF]
-      LayoutBlockFlow {p} at (0,706.30) size 761.97x26
+      LayoutBlockFlow (floating) {div} at (14.39,492.77) size 201.58x201.58 [border: (14.39px solid #FF0000)]
+        LayoutBlockFlow {div} at (28.78,28.78) size 144x144 [bgcolor=#0000FF]
+      LayoutBlockFlow {p} at (0,708.73) size 761.97x26
         LayoutText {#text} at (0,0) size 517x26
           text run at (0,0) width 517: "There should be a red, white and blue pattern above this"