[wasm] Properly plumb the origin of the WASM module from asm.js translation.

src/wasm/module-decoder.h

Index: src/wasm/module-decoder.h
diff --git a/src/wasm/module-decoder.h b/src/wasm/module-decoder.h
index 3f469a500e11857be71de7162ee7acb3517c441d..00a9b878c6d44a7c4028cfaeea984b171b9d9aeb 100644
--- a/src/wasm/module-decoder.h
+++ b/src/wasm/module-decoder.h
@@ -14,7 +14,7 @@ namespace wasm {
 // Decodes the bytes of a WASM module between {module_start} and {module_end}.
 ModuleResult DecodeWasmModule(Isolate* isolate, Zone* zone,
                               const byte* module_start, const byte* module_end,
-                              bool verify_functions, bool asm_js);
+                              bool verify_functions, ModuleOrigin origin);
 
 // Exposed for testing. Decodes a single function signature, allocating it
 // in the given zone. Returns {nullptr} upon failure.