[wasm] Use a Managed<WasmModule> to hold metadata about modules.

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 faaba1251f8d8d1d11d5637152b6cec92d7ec473..b332e71e49580ba9a4ac7da13ae2689b45c18a26 100644
--- a/src/wasm/module-decoder.h
+++ b/src/wasm/module-decoder.h
@@ -21,7 +21,7 @@ typedef std::vector<std::vector<std::pair<int, int>>> AsmJsOffsets;
 typedef Result<AsmJsOffsets> AsmJsOffsetsResult;
 
 // Decodes the bytes of a WASM module between {module_start} and {module_end}.
-V8_EXPORT_PRIVATE ModuleResult DecodeWasmModule(Isolate* isolate, Zone* zone,
+V8_EXPORT_PRIVATE ModuleResult DecodeWasmModule(Isolate* isolate,
                                                 const byte* module_start,
                                                 const byte* module_end,
                                                 bool verify_functions,