Update CSS tests to revision 7d0ff6117ee51720c307ea24d413d13eb5abf3e6

tests/wpt/css-tests/css-masking-1_dev/html/support/README

@@ -21,7 +21,6 @@ The square-* images all use 15x15 cells with one pixel borders.
 
 The pattern-* images use cells of various sizes:
 
-   pattern-gg-gr.png         20x20
    pattern-grg-rgr-grg.png   20x20
    pattern-rgr-grg-rgr.png   20x20
    pattern-tr.png            15x15

tests/wpt/css-tests/css-masking-1_dev/html/support/blue-100x50-transparent-100x50.svg

@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" version="1.1">
+  <rect x="0" y="0" width="100%" height="50%" fill="blue" fill-opacity="0"/>
+  <rect x="0" y="50" width="100%" height="50%" fill="blue" fill-opacity="1"/>
+</svg>

tests/wpt/css-tests/css-masking-1_dev/html/support/transparent-100x50-blue-100x50.svg

@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" version="1.1">
+  <rect x="0" y="0" width="100%" height="50%" fill="blue" fill-opacity="1"/>
+  <rect x="0" y="50" width="100%" height="50%" fill="blue" fill-opacity="0"/>
+</svg>