Register ReactRootView into FabricUIManagerModule

Reviewed By: achen1

Differential Revision: D7043902

fbshipit-source-id: fecef5a019dadd3d2802baa20dd8a3711e566ed3

ReactAndroid/src/main/java/com/facebook/react/uimanager/ReactShadowNode.java

@@ -132,11 +132,8 @@ public interface ReactShadowNode<T extends ReactShadowNode> {
 
   T getRootNode();
 
-  @Deprecated() //Replaced by setRootTag method.
   void setRootNode(T rootNode);
 
-  void setRootTag(int rootTag);
-
   void setViewClassName(String viewClassName);
 
   @Nullable

ReactAndroid/src/main/java/com/facebook/react/uimanager/ReactShadowNodeImpl.java

@@ -410,11 +410,6 @@ public class ReactShadowNodeImpl implements ReactShadowNode<ReactShadowNodeImpl>
     mRootNode = rootNode;
   }
 
-  @Override
-  public void setRootTag(int rootTag) {
-    mRootTag = rootTag;
-  }
-
   @Override
   public final void setViewClassName(String viewClassName) {
     mViewClassName = viewClassName;

ReactAndroid/src/main/java/com/facebook/react/uimanager/UIImplementation.java

@@ -277,7 +277,6 @@ public class UIImplementation {
     cssNode.setReactTag(tag);
     cssNode.setViewClassName(className);
     cssNode.setRootNode(rootNode);
-    if (rootNode != null) cssNode.setRootTag(rootNode.getReactTag());
     cssNode.setThemedContext(rootNode.getThemedContext());
 
     mShadowNodeRegistry.addNode(cssNode);