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

test/common/wasm/wasm-module-runner.h

Index: test/common/wasm/wasm-module-runner.h
diff --git a/test/common/wasm/wasm-module-runner.h b/test/common/wasm/wasm-module-runner.h
index 9ff8c6e574fd295ac9fe421d7a1b2f0bce89c06d..0ddb595fd6df94c5c4a688d6edc1d28d1ba8fa00 100644
--- a/test/common/wasm/wasm-module-runner.h
+++ b/test/common/wasm/wasm-module-runner.h
@@ -19,7 +19,7 @@ namespace wasm {
 namespace testing {
 
 // Decodes the given encoded module.
-const WasmModule* DecodeWasmModuleForTesting(Isolate* isolate, Zone* zone,
+const WasmModule* DecodeWasmModuleForTesting(Isolate* isolate,
                                              ErrorThrower* thrower,
                                              const byte* module_start,
                                              const byte* module_end,
@@ -49,8 +49,8 @@ int32_t InterpretWasmModule(Isolate* isolate, ErrorThrower* thrower,
 
 // Compiles WasmModule bytes and return an instance of the compiled module.
 const Handle<JSObject> CompileInstantiateWasmModuleForTesting(
-    Isolate* isolate, ErrorThrower* thrower, Zone* zone,
-    const byte* module_start, const byte* module_end, ModuleOrigin origin);
+    Isolate* isolate, ErrorThrower* thrower, const byte* module_start,
+    const byte* module_end, ModuleOrigin origin);
 
 // Runs the module instance with arguments.
 int32_t RunWasmModuleForTesting(Isolate* isolate, Handle<JSObject> instance,