remove const from UIManager::createNode and UIManager::cloneNode

Summary:
changelog: [internal]

These shadow nodes are freshly created and unsealed. Return non-const.

Reviewed By: NickGerleman

Differential Revision: D50796024

fbshipit-source-id: 6e2a61bb03efbc6f63a489928787e645971780df

Author: sammy-SC

packages/react-native/ReactCommon/react/renderer/core/ComponentDescriptor.h

@@ -78,7 +78,7 @@ class ComponentDescriptor {
   /*
    * Creates a new `ShadowNode` of a particular component type.
    */
-  virtual ShadowNode::Shared createShadowNode(
+  virtual std::shared_ptr<ShadowNode> createShadowNode(
       const ShadowNodeFragment& fragment,
       const ShadowNodeFamily::Shared& family) const = 0;
 

packages/react-native/ReactCommon/react/renderer/core/ConcreteComponentDescriptor.h

@@ -63,7 +63,7 @@ class ConcreteComponentDescriptor : public ComponentDescriptor {
     return ShadowNodeT::BaseTraits();
   }
 
-  ShadowNode::Shared createShadowNode(
+  std::shared_ptr<ShadowNode> createShadowNode(
       const ShadowNodeFragment& fragment,
       const ShadowNodeFamily::Shared& family) const override {
     auto shadowNode =

packages/react-native/ReactCommon/react/renderer/uimanager/UIManager.cpp

@@ -62,7 +62,7 @@ UIManager::~UIManager() {
                << ").";
 }
 
-ShadowNode::Shared UIManager::createNode(
+std::shared_ptr<ShadowNode> UIManager::createNode(
     Tag tag,
     const std::string& name,
     SurfaceId surfaceId,
@@ -109,7 +109,7 @@ ShadowNode::Shared UIManager::createNode(
   return shadowNode;
 }
 
-ShadowNode::Shared UIManager::cloneNode(
+std::shared_ptr<ShadowNode> UIManager::cloneNode(
     const ShadowNode& shadowNode,
     const ShadowNode::SharedListOfShared& children,
     const RawProps* rawProps) const {

packages/react-native/ReactCommon/react/renderer/uimanager/UIManager.h

@@ -130,14 +130,14 @@ class UIManager final : public ShadowTreeDelegate {
       const RootShadowNode::Shared& oldRootShadowNode,
       const RootShadowNode::Unshared& newRootShadowNode) const override;
 
-  ShadowNode::Shared createNode(
+  std::shared_ptr<ShadowNode> createNode(
       Tag tag,
       const std::string& componentName,
       SurfaceId surfaceId,
       const RawProps& props,
       const InstanceHandle::Shared& instanceHandle) const;
 
-  ShadowNode::Shared cloneNode(
+  std::shared_ptr<ShadowNode> cloneNode(
       const ShadowNode& shadowNode,
       const ShadowNode::SharedListOfShared& children = nullptr,
       const RawProps* rawProps = nullptr) const;