[0.71] Test HttpServer build fix (#12065)

* Test HttpServer build fix (#12001)

* Test HttpServer build fix

* Change files

* Cast m_ioThreadCount

* fix CoreApp?

---------

Co-authored-by: Julio César Rocha <JunielKatarn@users.noreply.github.com>
Co-authored-by: Julio C. Rocha <julio.rocha@microsoft.com>
Co-authored-by: Jon Thysell (JAUNTY) <jthysell@microsoft.com>

* Remove change files

* Change files

---------

Co-authored-by: Andrew Coates <30809111+acoates-ms@users.noreply.github.com>
Co-authored-by: Jon Thysell (JAUNTY) <jthysell@microsoft.com>

change/react-native-windows-26fd221c-e0c9-4384-bf27-342b79d0ca39.json

@@ -0,0 +1,7 @@
+{
+  "type": "patch",
+  "comment": "Test HttpServer build fix (#12001)",
+  "packageName": "react-native-windows",
+  "email": "julio.rocha@microsoft.com",
+  "dependentChangeType": "patch"
+}

vnext/Microsoft.ReactNative/CoreApp.cpp

@@ -231,7 +231,7 @@ static void SetProperties(JsonObject const &json, RNCoreApp *app) {
       std::wstring nsName;
       std::wstring localName;
       if (lastDot != name.rend()) {
-        nsName = std::wstring{name.begin(), static_cast<uint64_t>(name.rend() - lastDot - 1)};
+        nsName = std::wstring{name.begin(), static_cast<size_t>(name.rend() - lastDot - 1)};
         localName = std::wstring{lastDot.base()};
       } else {
         localName = name;

vnext/Test/HttpServer.cpp

@@ -283,8 +283,8 @@ void HttpSession::Close()
 
 #pragma region HttpServer
 
-HttpServer::HttpServer(string &&address, uint16_t port, size_t concurrency)
-  : m_ioThreadCount{concurrency}
+HttpServer::HttpServer(string &&address, uint16_t port, int concurrency)
+  : m_ioThreadCount{ static_cast<size_t>(concurrency) }
   , m_ioContext{concurrency}
   , m_acceptor{make_strand(m_ioContext)}
 {
@@ -319,7 +319,7 @@ HttpServer::HttpServer(string &&address, uint16_t port, size_t concurrency)
   }
 }
 
-HttpServer::HttpServer(uint16_t port, size_t concurrency)
+HttpServer::HttpServer(uint16_t port, int concurrency)
   : HttpServer("0.0.0.0", port, concurrency)
 {
 }

vnext/Test/HttpServer.h

@@ -126,8 +126,8 @@ class HttpServer : public std::enable_shared_from_this<HttpServer>
   // address - Valid IP address string (i.e. "127.0.0.1).
   // port    - TCP port number (i.e. 80).
   ///
-  HttpServer(std::string &&address, uint16_t port, size_t concurrency = 1);
-  HttpServer(uint16_t port, size_t concurrency = 1);
+  HttpServer(std::string &&address, uint16_t port, int concurrency = 1);
+  HttpServer(uint16_t port, int concurrency = 1);
 
   ~HttpServer();