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

src/wasm/module-decoder.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_WASM_MODULE_DECODER_H_
 #define V8_WASM_MODULE_DECODER_H_
 
 #include "src/wasm/ast-decoder.h"
 #include "src/wasm/wasm-module.h"
 
 namespace v8 {
 namespace internal {
 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.
 FunctionSig* DecodeWasmSignatureForTesting(Zone* zone, const byte* start,
                                            const byte* end);
 
 // Decodes the bytes of a WASM function between
 // {function_start} and {function_end}.
 FunctionResult DecodeWasmFunction(Isolate* isolate, Zone* zone, ModuleEnv* env,
                                   const byte* function_start,
                                   const byte* function_end);
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_WASM_MODULE_DECODER_H_