Fix flaky test paint/invalidation/background-resize-height.html

third_party/WebKit/LayoutTests/paint/invalidation/background-resize-height-expected.html

Index: third_party/WebKit/LayoutTests/paint/invalidation/background-resize-height-expected.html
diff --git a/third_party/WebKit/LayoutTests/paint/invalidation/background-resize-height-expected.html b/third_party/WebKit/LayoutTests/paint/invalidation/background-resize-height-expected.html
index 0868fbf550f265b2d1c738a96fed5b12b7ed2ef1..d4e8df17be0b0d9a492bf5b8bd9fdc6ae22a37e2 100644
--- a/third_party/WebKit/LayoutTests/paint/invalidation/background-resize-height-expected.html
+++ b/third_party/WebKit/LayoutTests/paint/invalidation/background-resize-height-expected.html
@@ -44,7 +44,7 @@
     left: 300px;
 }
 .center {
-    background-position: center; 
+    background-position: center;
     left: 350px;
 }
 .no-repeat {
@@ -73,9 +73,11 @@
     <div class="test image repeat-space"></div>
     <div class="test image repeat-round"></div>
     <div class="test generated"></div>
-    <div class="test generated cover"></div>
-    <div class="test generated contain"></div>
+    <div class="test generated size-cover"></div>
+    <div class="test generated size-contain"></div>
+    <!-- This produces invisible pixel difference.
     <div class="test generated fixed-height"></div>
+    -->
     <div class="test generated percent-height"></div>
     <div class="test generated top"></div>
     <div class="test generated bottom"></div>