Modularize InitializeCore

Summary: Split up InitializeCore into a bunch of modules. The idea here is to make it easier for apps to just get the initialization logic they want and leave behind what they don't; for example, if you don't want the Map/Set polyfills, instead of requiring InitializeCore you can require the modules you want from it.

Reviewed By: yungsters

Differential Revision: D10842564

fbshipit-source-id: 3b12d54fddea8c4ee75886022338c214987a015c

Libraries/Core/setUpBatchedBridge.js

@@ -0,0 +1,42 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow strict-local
+ * @format
+ */
+'use strict';
+
+/**
+ * Set up the BatchedBridge. This must be done after the other steps in
+ * InitializeCore to ensure that the JS environment has been initialized.
+ * You can use this module directly, or just require InitializeCore.
+ */
+const BatchedBridge = require('BatchedBridge');
+BatchedBridge.registerLazyCallableModule('Systrace', () => require('Systrace'));
+BatchedBridge.registerLazyCallableModule('JSTimers', () => require('JSTimers'));
+BatchedBridge.registerLazyCallableModule('HeapCapture', () =>
+  require('HeapCapture'),
+);
+BatchedBridge.registerLazyCallableModule('SamplingProfiler', () =>
+  require('SamplingProfiler'),
+);
+BatchedBridge.registerLazyCallableModule('RCTLog', () => require('RCTLog'));
+BatchedBridge.registerLazyCallableModule('RCTDeviceEventEmitter', () =>
+  require('RCTDeviceEventEmitter'),
+);
+BatchedBridge.registerLazyCallableModule('RCTNativeAppEventEmitter', () =>
+  require('RCTNativeAppEventEmitter'),
+);
+BatchedBridge.registerLazyCallableModule('PerformanceLogger', () =>
+  require('PerformanceLogger'),
+);
+BatchedBridge.registerLazyCallableModule('JSDevSupportModule', () =>
+  require('JSDevSupportModule'),
+);
+
+if (__DEV__ && !global.__RCTProfileIsProfiling) {
+  BatchedBridge.registerCallableModule('HMRClient', require('HMRClient'));
+}