fix: libuv hang on Windows (#28337)

* fix: libuv hang on Windows

* test: add a hang test

Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>

shell/common/node_bindings.cc

@@ -534,15 +534,13 @@ void NodeBindings::LoadEnvironment(node::Environment* env) {
 void NodeBindings::PrepareMessageLoop() {
 #if !defined(OS_WIN)
   int handle = uv_backend_fd(uv_loop_);
-#else
-  HANDLE handle = uv_loop_->iocp;
-#endif
 
   // If the backend fd hasn't changed, don't proceed.
   if (handle == handle_)
     return;
 
   handle_ = handle;
+#endif
 
   // Add dummy handle for libuv, otherwise libuv would quit when there is
   // nothing to do.

shell/common/node_bindings.h

@@ -159,9 +159,7 @@ class NodeBindings {
   // Isolate data used in creating the environment
   node::IsolateData* isolate_data_ = nullptr;
 
-#if defined(OS_WIN)
-  HANDLE handle_;
-#else
+#if !defined(OS_WIN)
   int handle_ = -1;
 #endif