[react_native] JS files from D2139723: [react_native] Set WebView user-agent from JS

Libraries/Components/WebView/WebView.android.js

@@ -43,6 +43,11 @@ var WebView = React.createClass({
     startInLoadingState: PropTypes.bool, // force WebView to show loadingView on first load
     style: View.propTypes.style,
     javaScriptEnabledAndroid: PropTypes.bool,
+    /**
+     * Sets the user-agent for this WebView. The user-agent can also be set in native through
+     * WebViewConfig, but this can and will overwrite that config.
+     */
+    userAgent: PropTypes.string,
     /**
      * Used to locate this view in end-to-end tests.
      */
@@ -91,6 +96,7 @@ var WebView = React.createClass({
         key="webViewKey"
         style={webViewStyles}
         url={this.props.url}
+        userAgent={this.props.userAgent}
         javaScriptEnabledAndroid={this.props.javaScriptEnabledAndroid}
         contentInset={this.props.contentInset}
         automaticallyAdjustContentInsets={this.props.automaticallyAdjustContentInsets}
@@ -172,6 +178,7 @@ var RCTWebView = createReactNativeComponentClass({
   validAttributes: merge(ReactNativeViewAttributes.UIView, {
     url: true,
     javaScriptEnabledAndroid: true,
+    userAgent: true,
   }),
   uiViewClassName: 'RCTWebView',
 });