RN: Switch `ProgressBarAndroid` to `React.forwardRef`

Reviewed By: sahrens

Differential Revision: D7904339

fbshipit-source-id: a4fe54acee7af12f1bc9b7c0d5e02a690f57ca0d

Libraries/Components/ProgressBarAndroid/ProgressBarAndroid.android.js

@@ -4,7 +4,9 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
+ * @format
  */
+
 'use strict';
 
 const ColorPropType = require('ColorPropType');
@@ -30,7 +32,9 @@ const indeterminateType = function(props, propName, componentName, ...rest) {
     const indeterminate = props[propName];
     const styleAttr = props.styleAttr;
     if (!indeterminate && styleAttr !== 'Horizontal') {
-      return new Error('indeterminate=false is only valid for styleAttr=Horizontal');
+      return new Error(
+        'indeterminate=false is only valid for styleAttr=Horizontal',
+      );
     }
   };
 
@@ -38,8 +42,8 @@ const indeterminateType = function(props, propName, componentName, ...rest) {
 };
 
 /**
- * React component that wraps the Android-only `ProgressBar`. This component is used to indicate
- * that the app is loading or there is some activity in the app.
+ * React component that wraps the Android-only `ProgressBar`. This component is
+ * used to indicate that the app is loading or there is activity in the app.
  *
  * Example:
  *
@@ -60,7 +64,7 @@ const indeterminateType = function(props, propName, componentName, ...rest) {
  * },
  * ```
  */
-class ProgressBarAndroid extends ReactNative.NativeComponent {
+class ProgressBarAndroid extends React.Component {
   static propTypes = {
     ...ViewPropTypes,
 
@@ -106,7 +110,8 @@ class ProgressBarAndroid extends ReactNative.NativeComponent {
   };
 
   render() {
-    return <AndroidProgressBar {...this.props} />;
+    const {forwardedRef, ...props} = this.props;
+    return <AndroidProgressBar {...props} ref={forwardedRef} />;
   }
 }
 
@@ -117,7 +122,9 @@ const AndroidProgressBar = requireNativeComponent(
     nativeOnly: {
       animating: true,
     },
-  }
+  },
 );
 
-module.exports = ProgressBarAndroid;
+module.exports = React.forwardRef((props, ref) => (
+  <ProgressBarAndroid {...props} forwardedRef={ref} />
+));