revert D2707930

Reviewed By: fkgozali

Differential Revision: D2720828

fb-gh-sync-id: 53113fb33150b42a7b597a7dfd04bb9885def029

Libraries/ReactNative/ReactNativeBaseComponent.js

@@ -104,11 +104,11 @@ ReactNativeBaseComponent.Mixin = {
     // no children - let's avoid calling out to the native bridge for a large
     // portion of the children.
     if (mountImages.length) {
-      
+      var indexes = cachedIndexArray(mountImages.length);
       // TODO: Pool these per platform view class. Reusing the `mountImages`
       // array would likely be a jit deopt.
       var createdTags = [];
-      for (var i = 0, l = mountImages.length; i < l; i++) {
+      for (var i = 0; i < mountImages.length; i++) {
         var mountImage = mountImages[i];
         var childTag = mountImage.tag;
         var childID = mountImage.rootNodeID;
@@ -122,15 +122,8 @@ ReactNativeBaseComponent.Mixin = {
         );
         createdTags[i] = mountImage.tag;
       }
-      
-      // Fast path for iOS
-      if (UIManager.addChildren) {
-        UIManager.addChildren(containerTag, createdTags);
-        return; 
-      }
-      
-      var indexes = cachedIndexArray(mountImages.length);
-      UIManager.manageChildren(containerTag, null, null, createdTags, indexes, null);
+      UIManager
+        .manageChildren(containerTag, null, null, createdTags, indexes, null);
     }
   },
 

Libraries/ReactNative/ReactNativeDOMIDOperations.js

@@ -53,7 +53,6 @@ var dangerouslyProcessChildrenUpdates = function(childrenUpdates, markupList) {
       (updates.addChildTags || (updates.addChildTags = [])).push(tag);
     }
   }
-  
   // Note this enumeration order will be different on V8!  Move `byContainerTag`
   // to a sparse array as soon as we confirm there are not horrible perf
   // penalties.

Libraries/ReactNative/ReactNativeMount.js

@@ -188,16 +188,6 @@ var ReactNativeMount = {
         mountImage.rootNodeID,
         mountImage.tag
       );
-      
-      // Fast path for iOS
-      if (UIManager.addChildren) {
-        UIManager.addChildren(
-          ReactNativeTagHandles.mostRecentMountedNodeHandleForRootNodeID(containerID),
-          [mountImage.tag]
-        );
-        return;
-      }
-      
       var addChildTags = [mountImage.tag];
       var addAtIndices = [0];
       UIManager.manageChildren(