Fix isBatchActive of RCTCxxBridge (#22785)

Summary:
Seems we lost handler of `isBatchActive` from [RCTBatchedBridge a86171a](a86171a482/React/Base/RCTBatchedBridge.m) to [RCTCxxBridge 5bc7e39](b774820dc2 (diff-a2a67635fffd7b690d14dc17ae563a71)).

Changelog:
----------

[iOS] [fixed] - Fix isBatchActive of RCTCxxBridge
Pull Request resolved: https://github.com/facebook/react-native/pull/22785

Reviewed By: mhorowitz

Differential Revision: D13731897

Pulled By: cpojer

fbshipit-source-id: 8d6b85bcea8fe8997a93b4e1ac8b8007422ca20e

React/CxxBridge/RCTCxxBridge.mm

@@ -152,7 +152,6 @@ struct RCTInstanceCallback : public InstanceCallback {
 
 @implementation RCTCxxBridge
 {
-  BOOL _wasBatchActive;
   BOOL _didInvalidate;
   BOOL _moduleRegistryCreated;
 
@@ -1348,7 +1347,7 @@ RCT_NOT_IMPLEMENTED(- (instancetype)initWithBundleURL:(__unused NSURL *)bundleUR
 
 - (BOOL)isBatchActive
 {
-  return _wasBatchActive;
+  return _reactInstance ? _reactInstance->isBatchActive() : NO;
 }
 
 - (void *)runtime

ReactCommon/cxxreact/Instance.cpp

@@ -150,6 +150,10 @@ bool Instance::isInspectable() {
   return nativeToJsBridge_ ? nativeToJsBridge_->isInspectable() : false;
 }
   
+bool Instance::isBatchActive() {
+  return nativeToJsBridge_ ? nativeToJsBridge_->isBatchActive() : false;
+}
+
 void Instance::callJSFunction(std::string &&module, std::string &&method,
                               folly::dynamic &&params) {
   callback_->incrementPendingJSCalls();

ReactCommon/cxxreact/Instance.h

@@ -58,6 +58,7 @@ public:
                          std::unique_ptr<const JSBigString> jsonValue);
   void *getJavaScriptContext();
   bool isInspectable();
+  bool isBatchActive();
   void callJSFunction(std::string &&module, std::string &&method,
                       folly::dynamic &&params);
   void callJSCallback(uint64_t callbackId, folly::dynamic &&params);

ReactCommon/cxxreact/NativeToJsBridge.cpp

@@ -38,6 +38,10 @@ public:
     return m_registry;
   }
   
+  bool isBatchActive() {
+    return m_batchHadNativeModuleCalls;
+  }
+
   void callNativeModules(
       JSExecutor& executor, folly::dynamic&& calls, bool isEndOfBatch) override {
 
@@ -223,6 +227,10 @@ bool NativeToJsBridge::isInspectable() {
   return m_executor->isInspectable();
 }
   
+bool NativeToJsBridge::isBatchActive() {
+  return m_delegate->isBatchActive();
+}
+
 void NativeToJsBridge::handleMemoryPressure(int pressureLevel) {
   runOnExecutorQueue([=] (JSExecutor* executor) {
     executor->handleMemoryPressure(pressureLevel);

ReactCommon/cxxreact/NativeToJsBridge.h

@@ -75,6 +75,7 @@ public:
   void setGlobalVariable(std::string propName, std::unique_ptr<const JSBigString> jsonValue);
   void* getJavaScriptContext();
   bool isInspectable();
+  bool isBatchActive();
 
   void handleMemoryPressure(int pressureLevel);