[fix] TextInput autoComplete="off"

Browsers treat autoComplete "off" as "on". The fix is to provide the browser
with an unrecognized value so that it doesn't attempt to auto-fill the input.

Fix #1249

packages/react-native-web/src/exports/TextInput/__tests__/index-test.js

@@ -25,7 +25,7 @@ describe('components/TextInput', () => {
 
     test('value "off"', () => {
       const input = findNativeInput(shallow(<TextInput autoComplete="off" />));
-      expect(input.prop('autoComplete')).toEqual('off');
+      expect(input.prop('autoComplete')).toEqual('noop');
     });
   });
 

packages/react-native-web/src/exports/TextInput/index.js

@@ -171,6 +171,7 @@ class TextInput extends Component<*> {
 
   render() {
     const {
+      autoComplete,
       autoCorrect,
       editable,
       keyboardType,
@@ -253,6 +254,9 @@ class TextInput extends Component<*> {
     const component = multiline ? 'textarea' : 'input';
 
     Object.assign(otherProps, {
+      // Browser's treat autocomplete "off" as "on"
+      // https://bugs.chromium.org/p/chromium/issues/detail?id=468153#c164
+      autoComplete: autoComplete === 'off' ? 'noop' : autoComplete,
       autoCorrect: autoCorrect ? 'on' : 'off',
       dir: 'auto',
       onBlur: normalizeEventHandler(this._handleBlur),