Backed out changeset b584ff6f5afa (bug 1453668) for R failures in file:///C:/Users/task_1523893739/build/tests/reftest/tests/layout/reftests/display-list/retained-dl-style-change-stacking-context-1.html on a CLOSED TREE

layout/painting/RetainedDisplayListBuilder.cpp

@@ -752,8 +752,7 @@ ProcessFrame(nsIFrame* aFrame, nsDisplayListBuilder& aBuilder,
     }
 
     if (currentFrame != aBuilder.RootReferenceFrame() &&
-        currentFrame->IsStackingContext() &&
-        currentFrame->IsFixedPosContainingBlock()) {
+        currentFrame->IsStackingContext()) {
       CRR_LOG("Frame belongs to stacking context frame %p\n", currentFrame);
       // If we found an intermediate stacking context with an existing display item
       // then we can store the dirty rect there and stop. If we couldn't find one then

layout/reftests/display-list/retained-dl-style-change-stacking-context-1.html

@@ -17,6 +17,9 @@
   <div style="transform:translateZ(1px)">
     <div id="second" style="background-color:red"></div>
   </div>
+  <div style="position:fixed; left:100px">
+    <div id="third" style="background-color:red"></div>
+  </div>
 </body>
 <script>
 function doTest() {