Support subpixel layout for borders.

third_party/WebKit/LayoutTests/platform/linux/fast/forms/select/listbox-appearance-basic-expected.txt

Index: third_party/WebKit/LayoutTests/platform/linux/fast/forms/select/listbox-appearance-basic-expected.txt
diff --git a/third_party/WebKit/LayoutTests/platform/linux/fast/forms/select/listbox-appearance-basic-expected.txt b/third_party/WebKit/LayoutTests/platform/linux/fast/forms/select/listbox-appearance-basic-expected.txt
index df2276704ccd4bb06604f7f4a00ae8cef78bda62..8d95a40a184261f8f92418d598772bcf1e6bf403 100644
--- a/third_party/WebKit/LayoutTests/platform/linux/fast/forms/select/listbox-appearance-basic-expected.txt
+++ b/third_party/WebKit/LayoutTests/platform/linux/fast/forms/select/listbox-appearance-basic-expected.txt
@@ -39,11 +39,11 @@ layer at (0,0) size 785x627 backgroundClip at (0,0) size 785x600 clip at (0,0) s
       LayoutText {#text} at (246,430) size 4x19
         text run at (246,430) width 4: " "
       LayoutBR {BR} at (0,0) size 0x0
-      LayoutText {#text} at (63,591) size 4x19
-        text run at (63,591) width 4: " "
-      LayoutText {#text} at (147,591) size 4x19
-        text run at (147,591) width 4: " "
-      LayoutBR {BR} at (151,591) size 0x19
+      LayoutText {#text} at (64,591) size 4x19
+        text run at (64,591) width 4: " "
+      LayoutText {#text} at (148,591) size 4x19
+        text run at (148,591) width 4: " "
+      LayoutBR {BR} at (152,591) size 0x19
 layer at (12,12) size 38x70 clip at (13,13) size 21x68
   LayoutListBox {SELECT} at (4,4) size 38x70 [bgcolor=#FFFFFF] [border: (1px solid #A9A9A9)]
     LayoutBlockFlow {OPTION} at (1,1) size 21x17
@@ -169,13 +169,13 @@ layer at (194,332) size 56x121 clip at (195,333) size 39x119
     LayoutBlockFlow {OPTION} at (1,21.19) size 39x29.80
       LayoutText {#text} at (2,0) size 35x27
         text run at (2,0) width 35: "bar"
-layer at (14,508) size 51x104 backgroundClip at (14,508) size 51x92 clip at (15,509) size 34x91
-  LayoutListBox {SELECT} at (6,500) size 51x104 [bgcolor=#FFFFFF] [border: (1px solid #A9A9A9)]
-    LayoutBlockFlow {OPTION} at (1,1) size 34x25.50
+layer at (14,507) size 52x105 backgroundClip at (14,507) size 52x93 clip at (16,509) size 34x91
+  LayoutListBox {SELECT} at (6,499) size 52x105 [bgcolor=#FFFFFF] [border: (1.50px solid #A9A9A9)]
+    LayoutBlockFlow {OPTION} at (1.50,1.50) size 34x25.50
       LayoutText {#text} at (3,0) size 28x23
         text run at (3,0) width 28: "foo"
-layer at (83,466) size 64x144 backgroundClip at (83,466) size 64x134 clip at (85,468) size 45x132
-  LayoutListBox {SELECT} at (75,458) size 64x144 [bgcolor=#FFFFFF] [border: (2px solid #A9A9A9)]
+layer at (84,466) size 64x144 backgroundClip at (84,466) size 64x134 clip at (86,468) size 45x132
+  LayoutListBox {SELECT} at (76,458) size 64x144 [bgcolor=#FFFFFF] [border: (2px solid #A9A9A9)]
     LayoutBlockFlow {OPTION} at (2,2) size 45x35
       LayoutText {#text} at (4,0) size 37x32
         text run at (4,0) width 37: "foo"