Fix isBatchActive of RCTCxxBridge (#22785)

Summary:
Seems we lost handler of `isBatchActive` from [RCTBatchedBridge a86171a](https://github.com/facebook/react-native/blob/a86171a48284c440226a79a26c6d6a4704d401e9/React/Base/RCTBatchedBridge.m) to [RCTCxxBridge 5bc7e39](facebook/react-native@b774820#diff-a2a67635fffd7b690d14dc17ae563a71).

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

[iOS] [fixed] - Fix isBatchActive of RCTCxxBridge
Pull Request resolved: facebook/react-native#22785

Reviewed By: mhorowitz

Differential Revision: D13731897

Pulled By: cpojer

fbshipit-source-id: 8d6b85bcea8fe8997a93b4e1ac8b8007422ca20e

Author: zhongwuzw

React/CxxBridge/RCTCxxBridge.mm

@@ -156,7 +156,6 @@ void onBatchComplete() override {
 
 @implementation RCTCxxBridge
 {
-  BOOL _wasBatchActive;
   BOOL _didInvalidate;
   BOOL _moduleRegistryCreated;
 
@@ -1306,7 +1305,7 @@ - (void)stopProfiling:(void (^)(NSData *))callback
 
 - (BOOL)isBatchActive
 {
-  return _wasBatchActive;
+  return _reactInstance ? _reactInstance->isBatchActive() : NO;
 }
 
 @end

ReactCommon/cxxreact/Instance.cpp

@@ -147,6 +147,10 @@ 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

@@ -56,6 +56,7 @@ class RN_EXPORT Instance {
                          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

@@ -34,6 +34,10 @@ class JsToNativeBridge : public react::ExecutorDelegate {
     return m_registry;
   }
 
+  bool isBatchActive() {
+    return m_batchHadNativeModuleCalls;
+  }
+
   void callNativeModules(
       JSExecutor& executor, folly::dynamic&& calls, bool isEndOfBatch) override {
 
@@ -215,6 +219,10 @@ bool NativeToJsBridge::isInspectable() {
   return m_executor->isInspectable();
 }
 
+bool NativeToJsBridge::isBatchActive() {
+  return m_delegate->isBatchActive();
+}
+
 #ifdef WITH_JSC_MEMORY_PRESSURE
 void NativeToJsBridge::handleMemoryPressure(int pressureLevel) {
   runOnExecutorQueue([=] (JSExecutor* executor) {

ReactCommon/cxxreact/NativeToJsBridge.h

@@ -102,6 +102,7 @@ class NativeToJsBridge {
   void setGlobalVariable(std::string propName, std::unique_ptr<const JSBigString> jsonValue);
   void* getJavaScriptContext();
   bool isInspectable();
+  bool isBatchActive();
 
   #ifdef WITH_JSC_MEMORY_PRESSURE
   void handleMemoryPressure(int pressureLevel);