Issue #3595 - Add an actual scheduler; use joined threads for file system

src/FileSystemJsObject.cpp

Index: src/FileSystemJsObject.cpp
===================================================================
--- a/src/FileSystemJsObject.cpp
+++ b/src/FileSystemJsObject.cpp
@@ -258,7 +258,7 @@
         "Second argument to _fileSystem.read must be a function"));
     const auto readTask = std::make_shared<ReadTask>(jsEngine, converted[1],
         converted[0]->AsString());
-    AdblockPlus::Scheduler::StartImmediatelyInSingleUseThread(AdblockPlus::MakeHeapFunction(readTask));
+    jsEngine->Schedule(AdblockPlus::MakeHeapFunction(readTask), AdblockPlus::ImmediateSingleUseThread);
     return v8::Undefined();
   }
 
@@ -276,7 +276,7 @@
         "Third argument to _fileSystem.write must be a function"));
     const auto writeTask = std::make_shared<WriteTask>(jsEngine, converted[2],
         converted[0]->AsString(), converted[1]->AsString());
-    AdblockPlus::Scheduler::StartImmediatelyInSingleUseThread(AdblockPlus::MakeHeapFunction(writeTask));
+    jsEngine->Schedule(AdblockPlus::MakeHeapFunction(writeTask), AdblockPlus::ImmediateSingleUseThread);
     return v8::Undefined();
   }
 
@@ -294,7 +294,7 @@
         "Third argument to _fileSystem.move must be a function"));
     const auto moveTask = std::make_shared<MoveTask>(jsEngine, converted[2],
         converted[0]->AsString(), converted[1]->AsString());
-    AdblockPlus::Scheduler::StartImmediatelyInSingleUseThread(AdblockPlus::MakeHeapFunction(moveTask));
+    jsEngine->Schedule(AdblockPlus::MakeHeapFunction(moveTask), AdblockPlus::ImmediateSingleUseThread);
     return v8::Undefined();
   }
 
@@ -312,7 +312,7 @@
         "Second argument to _fileSystem.remove must be a function"));
     const auto removeTask = std::make_shared<RemoveTask>(jsEngine, converted[1],
         converted[0]->AsString());
-    AdblockPlus::Scheduler::StartImmediatelyInSingleUseThread(AdblockPlus::MakeHeapFunction(removeTask));
+    jsEngine->Schedule(AdblockPlus::MakeHeapFunction(removeTask), AdblockPlus::ImmediateSingleUseThread);
     return v8::Undefined();
   }
 
@@ -330,7 +330,7 @@
         "Second argument to _fileSystem.stat must be a function"));
     const auto statTask = std::make_shared<StatTask>(jsEngine, converted[1],
         converted[0]->AsString());
-    AdblockPlus::Scheduler::StartImmediatelyInSingleUseThread(AdblockPlus::MakeHeapFunction(statTask));
+    jsEngine->Schedule(AdblockPlus::MakeHeapFunction(statTask), AdblockPlus::ImmediateSingleUseThread);
     return v8::Undefined();
   }