Fabric: Using RootShadowNode instead of ShadowNode in ShadowTreeRevision

Summary:
It's more correct and we will rely on this in the future.

Changelog: [Internal] Fabric-specific internal change.

Reviewed By: JoshuaGross

Differential Revision: D23681508

fbshipit-source-id: 5fef0ea164e8a400e6ca9a67947252b47ce6d44e

ReactCommon/react/renderer/mounting/ShadowTreeRevision.cpp

@@ -13,7 +13,7 @@ namespace react {
 using Number = ShadowTreeRevision::Number;
 
 ShadowTreeRevision::ShadowTreeRevision(
-    ShadowNode::Shared const &rootShadowNode,
+    RootShadowNode::Shared const &rootShadowNode,
     Number number,
     TransactionTelemetry telemetry)
     : rootShadowNode_(rootShadowNode), number_(number), telemetry_(telemetry) {}
@@ -22,7 +22,7 @@ TransactionTelemetry const &ShadowTreeRevision::getTelemetry() const {
   return telemetry_;
 }
 
-ShadowNode const &ShadowTreeRevision::getRootShadowNode() {
+RootShadowNode const &ShadowTreeRevision::getRootShadowNode() {
   return *rootShadowNode_;
 }
 

ReactCommon/react/renderer/mounting/ShadowTreeRevision.h

@@ -9,6 +9,7 @@
 
 #include <better/optional.h>
 
+#include <react/renderer/components/root/RootShadowNode.h>
 #include <react/renderer/mounting/MountingOverrideDelegate.h>
 #include <react/renderer/mounting/MountingTransaction.h>
 #include <react/renderer/mounting/ShadowViewMutation.h>
@@ -34,7 +35,7 @@ class ShadowTreeRevision final {
    * telemetry.
    */
   ShadowTreeRevision(
-      ShadowNode::Shared const &rootShadowNode,
+      RootShadowNode::Shared const &rootShadowNode,
       Number number,
       TransactionTelemetry telemetry);
 
@@ -48,7 +49,7 @@ class ShadowTreeRevision final {
    * `MountingOverrideDelegate` only.
    */
  public:
-  ShadowNode const &getRootShadowNode();
+  RootShadowNode const &getRootShadowNode();
 
   /*
    * Methods from this section are meant to be used by `MountingCoordinator`
@@ -60,7 +61,7 @@ class ShadowTreeRevision final {
   Number getNumber() const;
 
  private:
-  ShadowNode::Shared rootShadowNode_;
+  RootShadowNode::Shared rootShadowNode_;
   Number number_;
   TransactionTelemetry telemetry_;
 };