Revert D2926896 WebWorkers: Move web worker impl to JSCExecutor

Reviewed By: lexs

Differential Revision: D2982150

fb-gh-sync-id: c75d05988df50b9788608e7c1bf00c4952ccfce1
shipit-source-id: c75d05988df50b9788608e7c1bf00c4952ccfce1

ReactAndroid/src/main/jni/react/MessageQueueThread.h

@@ -2,9 +2,7 @@
 
 #pragma once
 
-#include <condition_variable>
 #include <functional>
-#include <mutex>
 
 namespace facebook {
 namespace react {
@@ -16,24 +14,6 @@ class MessageQueueThread {
   virtual bool isOnThread() = 0;
   // quitSynchronous() should synchronously ensure that no further tasks will run on the queue.
   virtual void quitSynchronous() = 0;
-
-  void runOnQueueSync(std::function<void()>&& runnable) {
-    std::mutex signalMutex;
-    std::condition_variable signalCv;
-    bool runnableComplete = false;
-
-    runOnQueue([&] () mutable {
-      std::lock_guard<std::mutex> lock(signalMutex);
-
-      runnable();
-      runnableComplete = true;
-
-      signalCv.notify_one();
-    });
-
-    std::unique_lock<std::mutex> lock(signalMutex);
-    signalCv.wait(lock, [&runnableComplete] { return runnableComplete; });
-  }
 };
 
 }}