WebWorkers: Allow web worker owner to inject globals into worker, supply modified __fbBatchedBridgeConfig

Summary: Now that web workers are just JSCExecutors, we can move forward with adding native module support. The means we need to supply the worker with a correct __fbBatchedBridgeConfig global so it can appropriately set up its JS MessageQueue. Unfortunately, native modules can't support multiple JS execution contexts out-of-the-box, so we need to whitelist those modules that actually can be referenced from a webworker. In order to do that, we add the supportsWebWorkers call in NativeModule and the SupportsWebWorkers annotation for JS modules. These add metadata to __fbBatchedBridgeConfig which allows us to create a new config with only those modules that support web workers.

Reviewed By: lexs

Differential Revision: D2927091

fb-gh-sync-id: 9b47331253b277940b552e7d899198b5f0a3ed8c
shipit-source-id: 9b47331253b277940b552e7d899198b5f0a3ed8c

ReactAndroid/src/main/java/com/facebook/react/bridge/NativeModuleRegistry.java

@@ -65,6 +65,7 @@ public class NativeModuleRegistry {
       for (ModuleDefinition moduleDef : mModuleTable) {
         jg.writeObjectFieldStart(moduleDef.name);
         jg.writeNumberField("moduleID", moduleDef.id);
+        jg.writeBooleanField("supportsWebWorkers", moduleDef.target.supportsWebWorkers());
         jg.writeObjectFieldStart("methods");
         for (int i = 0; i < moduleDef.methods.size(); i++) {
           MethodRegistration method = moduleDef.methods.get(i);