Fabric: De-virtualizing LayoutableShadowNode::setLayoutMetrics()

Summary:
Removing `virtual` qualifier for `LayoutableShadowNode::setLayoutMetrics()`. Original design implied that some subclass might override that method to provide additional functionality but we never used that and seems not it does not much the overall design: we store `layoutMetrics` *inside* `LayoutableShadowNode`.

Changelog: [Internal] Fabric-specific internal change.

Reviewed By: sammy-SC

Differential Revision: D20268042

fbshipit-source-id: 2aa9b3da316b97f26493fb04d19ca8290bd5d2a6

Author: shergin

ReactCommon/fabric/core/layout/LayoutableShadowNode.h

@@ -98,6 +98,12 @@ class LayoutableShadowNode : public ShadowNode {
       LayoutableShadowNode const &ancestorLayoutableShadowNode,
       LayoutInspectingPolicy policy) const;
 
+  /*
+   * Sets layout metrics for the shadow node.
+   * Returns true if the metrics are different from previous ones.
+   */
+  bool setLayoutMetrics(LayoutMetrics layoutMetrics);
+
   /*
    * Returns the ShadowNode that is rendered at the Point received as a
    * parameter.
@@ -140,12 +146,6 @@ class LayoutableShadowNode : public ShadowNode {
    */
   LayoutableShadowNode::UnsharedList getLayoutableChildNodes() const;
 
-  /*
-   * Sets layout metrics for the shadow node.
-   * Returns true if the metrics are different from previous ones.
-   */
-  virtual bool setLayoutMetrics(LayoutMetrics layoutMetrics);
-
 #pragma mark - DebugStringConvertible
 
 #if RN_DEBUG_STRING_CONVERTIBLE

ReactCommon/fabric/core/tests/TestComponent.h

@@ -55,10 +55,6 @@ class TestShadowNode : public ConcreteViewShadowNode<
 
   Transform _transform{Transform::Identity()};
 
-  bool setLayoutMetrics(LayoutMetrics layoutMetrics) override {
-    return YogaLayoutableShadowNode::setLayoutMetrics(layoutMetrics);
-  }
-
   Transform getTransform() const override {
     return _transform;
   }