Bug 1219411: Correctly use RGBA instead of RGB for the background color in background-blending-moz-element reftest. r=mstange

layout/reftests/css-blending/background-blending-moz-element-ref.html

@@ -9,7 +9,7 @@
 
 .c {
     height: 10px;
-    background: rgb(0,255,0,.5);
+    background: rgba(0,255,0,.5);
 }
 
 </style>

layout/reftests/css-blending/background-blending-moz-element.html

@@ -12,7 +12,7 @@ div {
 }
 
 #b {
-	background: rgb(0,255,0,.5);
+	background: rgba(0,255,0,.5);
 }
 #c {
     background: -moz-element(#b);