[WASM] Make type literals use getMetadataTypeDeclaration when gener…

…ating the call to `$getClassMetadata`.

This is in preparation for JsEnum, where the original type is removed and replaced by the overlay type.

Note that this is a no-op for the most part, but completely breaks `MyJsFunction.class`, where it tries to call "$getClassMetadata__java_lang_Class@vmbootstrap.JavaScriptFunction"

PiperOrigin-RevId: 571102974

transpiler/java/com/google/j2cl/transpiler/passes/ImplementClassMetadataViaGetters.java

@@ -137,6 +137,10 @@ private Expression implementTypeLiteral(TypeDescriptor typeDescriptor) {
           .setArguments(NumberLiteral.fromInt(arrayTypeDescriptor.getDimensions()))
           .build();
     }
+    if (typeDescriptor instanceof DeclaredTypeDescriptor) {
+      return getClassLiteralMethodCall(
+          typeDescriptor.getMetadataTypeDeclaration().toRawTypeDescriptor());
+    }
     return getClassLiteralMethodCall(typeDescriptor);
   }
 

transpiler/javatests/com/google/j2cl/integration/java/classliteral/Main.java

@@ -204,8 +204,9 @@ private interface NativeFunction {
   @JsType(isNative = true, namespace = JsPackage.GLOBAL, name = "Object")
   private interface NativeInterface {}
 
+  @Wasm(
+      "nop") // TODO(b/301385322): remove when class literals on native JS objects are implemented.
   private static void testNative() {
-    // TODO(b/301385322) getClass() on Native JavaScript objects is not supported in Wasm.
     // Native types don't apply in the context of the JVM.
     if (!isJavaScript()) {
       return;

transpiler/javatests/com/google/j2cl/integration/java/classliteralstripped/Main.java

@@ -21,6 +21,7 @@
 import static com.google.j2cl.integration.testing.Asserts.assertTrue;
 import static com.google.j2cl.integration.testing.TestUtils.isWasm;
 
+import javaemul.internal.annotations.Wasm;
 import jsinterop.annotations.JsEnum;
 import jsinterop.annotations.JsFunction;
 import jsinterop.annotations.JsPackage;
@@ -136,11 +137,9 @@ interface NativeFunction {
     void f();
   }
 
+  @Wasm(
+      "nop") // TODO(b/301385322): remove when class literals on native JS objects are implemented.
   private static void testNative() {
-    // TODO(b/301385322) getClass() on Native JavaScript objects is not supported in Wasm.
-    if (isWasm()) {
-      return;
-    }
     assertClass(NativeInterface.class);
     assertClass(NativeFunction.class);
     assertClass(NativeClass.class);