Backout Force Diffing algorithm to insert views Bottom Up

Summary: This is a temporary backout of D14817454, to verify if this is related T45503571

Reviewed By: JoshuaGross

Differential Revision: D15780018

fbshipit-source-id: 455034ce7b7096101db93a8604b77e1233db1137

ReactCommon/fabric/mounting/Differentiator.cpp

@@ -283,14 +283,14 @@ static void calculateShadowViewMutations(
       createMutations.begin(),
       createMutations.end(),
       std::back_inserter(mutations));
-  std::move(
-      downwardMutations.begin(),
-      downwardMutations.end(),
-      std::back_inserter(mutations));
   std::move(
       insertMutations.begin(),
       insertMutations.end(),
       std::back_inserter(mutations));
+  std::move(
+      downwardMutations.begin(),
+      downwardMutations.end(),
+      std::back_inserter(mutations));
 }
 
 ShadowViewMutation::List calculateShadowViewMutations(