[wasm] mark JSImportGenerator C# only #72007

- mark JSImportGenerator C# only
- Viktor's feedback
- put back lost method GetCSOwnedObjectJSHandleRef

src/libraries/System.Runtime.InteropServices.JavaScript/gen/JSImportGenerator/JSImportGenerator.csproj

@@ -21,6 +21,7 @@
     <PackageTags>JSImportGenerator, analyzers</PackageTags>
     <IsNETCoreAppAnalyzer>true</IsNETCoreAppAnalyzer>
     <DefineConstants>$(DefineConstants);JSIMPORTGENERATOR</DefineConstants>
+    <AnalyzerLanguage>cs</AnalyzerLanguage>
   </PropertyGroup>
 
   <ItemGroup>

src/libraries/System.Runtime.InteropServices.JavaScript/src/System.Runtime.InteropServices.JavaScript.csproj

@@ -3,7 +3,6 @@
     <TargetFrameworks>$(NetCoreAppCurrent)-Browser;$(NetCoreAppCurrent)</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <Nullable>enable</Nullable>
-    <RootNamespace></RootNamespace>
   </PropertyGroup>
 
   <!-- DesignTimeBuild requires all the TargetFramework Derived Properties to not be present in the first property group. -->
@@ -12,15 +11,6 @@
     <GeneratePlatformNotSupportedAssemblyMessage Condition="'$(TargetPlatformIdentifier)' != 'Browser'">SR.SystemRuntimeInteropServicesJavaScript_PlatformNotSupported</GeneratePlatformNotSupportedAssemblyMessage>
   </PropertyGroup>
 
-  <ItemGroup>
-    <Reference Include="System.Collections" />
-    <Reference Include="System.Memory" />
-    <Reference Include="System.Net.Primitives" />
-    <Reference Include="System.Runtime" />
-    <Reference Include="System.Runtime.InteropServices" />
-    <Reference Include="System.Threading" />
-  </ItemGroup>
-
   <ItemGroup>
     <Compile Include="System.Runtime.InteropServices.JavaScript.SupportedOSPlatform.cs" />
   </ItemGroup>
@@ -70,9 +60,16 @@
     <Compile Include="System\Runtime\InteropServices\JavaScript\Marshaling\JSMarshalerArgument.JSObject.cs" />
     <Compile Include="System\Runtime\InteropServices\JavaScript\Marshaling\JSMarshalerArgument.String.cs" />
     <Compile Include="System\Runtime\InteropServices\JavaScript\Marshaling\JSMarshalerArgument.Exception.cs" />
-
+  </ItemGroup>
+  <ItemGroup>
+    <Reference Include="System.Collections" />
+    <Reference Include="System.Memory" />
+    <Reference Include="System.Net.Primitives" />
+    <Reference Include="System.Runtime" />
+    <Reference Include="System.Runtime.InteropServices" />
+    <Reference Include="System.Threading" />
   </ItemGroup>
   <ItemGroup Condition="'$(TargetPlatformIdentifier)' == 'Browser'">
-    <AnalyzerReference Include="$(LibrariesProjectRoot)System.Runtime.InteropServices.JavaScript\gen\JSImportGenerator\JSImportGenerator.csproj" Pack="true" ReferenceAnalyzer="true" />
+    <ProjectReference Include="$(LibrariesProjectRoot)System.Runtime.InteropServices.JavaScript\gen\JSImportGenerator\JSImportGenerator.csproj" OutputItemType="Analyzer" ReferenceOutputAssembly="false" />
   </ItemGroup>
 </Project>

src/libraries/System.Runtime.InteropServices.JavaScript/src/System/Runtime/InteropServices/JavaScript/Interop/JavaScriptExports.cs

@@ -31,6 +31,18 @@ public static void GetCSOwnedObjectByJSHandleRef(IntPtr jsHandle, int shouldAddI
             result = null;
         }
 
+        [MethodImplAttribute(MethodImplOptions.NoInlining)] // https://github.com/dotnet/runtime/issues/71425
+        public static IntPtr GetCSOwnedObjectJSHandleRef(in JSObject jsObject, int shouldAddInflight)
+        {
+            jsObject.AssertNotDisposed();
+
+            if (shouldAddInflight != 0)
+            {
+                jsObject.AddInFlight();
+            }
+            return jsObject.JSHandle;
+        }
+
         [MethodImplAttribute(MethodImplOptions.NoInlining)] // https://github.com/dotnet/runtime/issues/71425
         public static IntPtr TryGetCSOwnedObjectJSHandleRef(in object rawObj, int shouldAddInflight)
         {