Update test expectations.

This test relies on pixel-perfect behavior, but the tests can result
in rasterizers being off by 1.0 / 255.0 for a few pixels.

tests/wpt/metadata/css/css-backgrounds/background-repeat/background-repeat-round-roundup.xht.ini

@@ -0,0 +1,3 @@
+[background-repeat-round-roundup.xht]
+  type: reftest
+  expected: FAIL

tests/wpt/metadata/css/css-backgrounds/background-repeat/background-repeat-round.xht.ini

@@ -0,0 +1,5 @@
+[background-repeat-round.xht]
+  type: reftest
+  expected:
+    if os == "linux": FAIL
+

tests/wpt/metadata/css/css-backgrounds/background-size-025.html.ini

@@ -1,3 +1,3 @@
-[transform-input-018.html]
+[background-size-025.html]
   type: reftest
   expected: FAIL

tests/wpt/metadata/css/css-backgrounds/background-size-027.html.ini

@@ -0,0 +1,3 @@
+[background-size-027.html]
+  type: reftest
+  expected: FAIL

tests/wpt/metadata/css/css-backgrounds/background-size/background-size-contain.xht.ini

@@ -0,0 +1,3 @@
+[background-size-contain.xht]
+  type: reftest
+  expected: FAIL

tests/wpt/metadata/css/css-backgrounds/background-size/background-size-cover.xht.ini

@@ -0,0 +1,3 @@
+[background-size-cover.xht]
+  type: reftest
+  expected: FAIL

tests/wpt/metadata/css/css-backgrounds/css3-box-shadow.html.ini

@@ -0,0 +1,5 @@
+[css3-box-shadow.html]
+  type: reftest
+  expected:
+    if os == "linux": FAIL
+

tests/wpt/metadata/css/css-images/gradient-move-stops.html.ini

@@ -0,0 +1,3 @@
+[gradient-move-stops.html]
+  type: reftest
+  expected: FAIL

tests/wpt/mozilla/meta/css/border-image-linear-gradient.html.ini

@@ -0,0 +1,4 @@
+[border-image-linear-gradient.html]
+  type: reftest
+  expected: FAIL
+