Convert cross-fade-background-image to ref-test

LayoutTests/platform/chromium-win/animations/cross-fade-background-image-expected.txt

Index: LayoutTests/platform/chromium-win/animations/cross-fade-background-image-expected.txt
diff --git a/LayoutTests/platform/chromium-win/animations/cross-fade-background-image-expected.txt b/LayoutTests/platform/chromium-win/animations/cross-fade-background-image-expected.txt
deleted file mode 100644
index 57f2e45f5c21d4ea8294d716143c9dc92a885abd..0000000000000000000000000000000000000000
--- a/LayoutTests/platform/chromium-win/animations/cross-fade-background-image-expected.txt
+++ /dev/null
@@ -1,21 +0,0 @@
-layer at (0,0) size 800x600
-  RenderView at (0,0) size 800x600
-layer at (0,0) size 800x600
-  RenderBlock {HTML} at (0,0) size 800x600
-    RenderBody {BODY} at (8,8) size 784x584
-      RenderBlock {DIV} at (0,0) size 784x60
-        RenderText {#text} at (0,0) size 550x19
-          text run at (0,0) width 550: "PASS - \"backgroundImage\" property for \"box\" element at 2.5s saw something close to: 0.5"
-        RenderBR {BR} at (550,15) size 0x0
-        RenderText {#text} at (0,20) size 671x19
-          text run at (0,20) width 671: "PASS - \"backgroundImage\" property for \"box\" and \"boxStatic\" elements at 2.5s are close enough to each other"
-        RenderBR {BR} at (671,35) size 0x0
-        RenderText {#text} at (0,40) size 733x19
-          text run at (0,40) width 733: "PASS - \"backgroundImage\" property for \"boxShorthand\" and \"boxStatic\" elements at 2.5s are close enough to each other"
-        RenderBR {BR} at (733,55) size 0x0
-layer at (100,100) size 100x100
-  RenderBlock (positioned) {DIV} at (100,100) size 100x100 [bgcolor=#FF0000]
-layer at (100,300) size 100x100
-  RenderBlock (positioned) {DIV} at (100,300) size 100x100 [bgcolor=#FF0000]
-layer at (100,200) size 100x100
-  RenderBlock (positioned) {DIV} at (100,200) size 100x100