Embed ReactNative event types in JavaScript (#10567)

* ReactNative doesn't query UIManager for native event types
This is a pre-req to unblock Prepack optimiations for ReactNative apps
* Replaced mock ReactNativeEventTypes with mock Platform
* Added Platform.OS to RN host hooks Flow types

flow/react-native-host-hooks.js

@@ -32,6 +32,9 @@ declare module 'ExceptionsManager' {
     isFatal: boolean,
   ) : void;
 }
+declare module 'Platform' {
+  declare var OS : string;
+}
 declare module 'UIManager' {
   declare var customBubblingEventTypes : Object;
   declare var customDirectEventTypes : Object;

scripts/rollup/bundles.js

@@ -263,6 +263,7 @@ const bundles = [
     externals: [
       'ExceptionsManager',
       'InitializeCore',
+      'Platform',
       'RCTEventEmitter',
       'TextInputState',
       'UIManager',

src/__mocks__/Platform.js

@@ -0,0 +1,13 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+'use strict';
+
+module.exports = {
+  OS: 'ios',
+};

src/__mocks__/UIManager.js

@@ -155,52 +155,6 @@ var RCTUIManager = {
   }),
   replaceExistingNonRootView: jest.fn(),
   __takeSnapshot: jest.fn(),
-  customBubblingEventTypes: {
-    topBlur: {
-      phasedRegistrationNames: {
-        bubbled: 'onBlur',
-        captured: 'onBlurCapture',
-      },
-    },
-    topFocus: {
-      phasedRegistrationNames: {
-        bubbled: 'onFocus',
-        captured: 'onFocusCapture',
-      },
-    },
-    topTouchCancel: {
-      phasedRegistrationNames: {
-        bubbled: 'onTouchCancel',
-        captured: 'onTouchCancelCapture',
-      },
-    },
-    topTouchEnd: {
-      phasedRegistrationNames: {
-        bubbled: 'onTouchEnd',
-        captured: 'onTouchEndCapture',
-      },
-    },
-    topTouchMove: {
-      phasedRegistrationNames: {
-        bubbled: 'onTouchMove',
-        captured: 'onTouchMoveCapture',
-      },
-    },
-    topTouchStart: {
-      phasedRegistrationNames: {
-        bubbled: 'onTouchStart',
-        captured: 'onTouchStartCapture',
-      },
-    },
-  },
-  customDirectEventTypes: {
-    topAccessibilityTap: {
-      registrationName: 'onAccessibilityTap',
-    },
-    topTextLayout: {
-      registrationName: 'onTextLayout',
-    },
-  },
 };
 
 module.exports = RCTUIManager;

src/renderers/native/ReactNativeBridgeEventPlugin.js

@@ -13,10 +13,10 @@
 
 var EventPropagators = require('EventPropagators');
 var SyntheticEvent = require('SyntheticEvent');
-var UIManager = require('UIManager');
+var ReactNativeEventTypes = require('ReactNativeEventTypes');
 
-var customBubblingEventTypes = UIManager.customBubblingEventTypes;
-var customDirectEventTypes = UIManager.customDirectEventTypes;
+var customBubblingEventTypes = ReactNativeEventTypes.customBubblingEventTypes;
+var customDirectEventTypes = ReactNativeEventTypes.customDirectEventTypes;
 
 if (__DEV__) {
   var warning = require('fbjs/lib/warning');