[wasm] Separate compilation from instantiation

test/unittests/wasm/ast-decoder-unittest.cc

 // 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.
 
 #include "test/unittests/test-utils.h"
 
 #include "src/v8.h"
 
 #include "test/cctest/wasm/test-signatures.h"
 
@@ skipping 1138 matching lines @@
 }
 
 namespace {
 // A helper for tests that require a module environment for functions and
 // globals.
 class TestModuleEnv : public ModuleEnv {
  public:
   TestModuleEnv() {
     instance = nullptr;
     module = &mod;
-    linker = nullptr;
   }
   byte AddGlobal(MachineType mem_type) {
     mod.globals.push_back({0, 0, mem_type, 0, false});
     CHECK(mod.globals.size() <= 127);
     return static_cast<byte>(mod.globals.size() - 1);
   }
   byte AddSignature(FunctionSig* sig) {
     mod.signatures.push_back(sig);
     CHECK(mod.signatures.size() <= 127);
     return static_cast<byte>(mod.signatures.size() - 1);
@@ skipping 1264 matching lines @@
   LocalTypeMap map = Expand(decls);
   size_t pos = 0;
   pos = ExpectRun(map, pos, kAstF32, 5);
   pos = ExpectRun(map, pos, kAstI32, 1337);
   pos = ExpectRun(map, pos, kAstI64, 212);
 }
 
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8