[test] Remove pesky MachineCallHelper from inheritance chain.

test/cctest/compiler/graph-builder-tester.cc

-// Copyright 2014 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/cctest/compiler/graph-builder-tester.h"
-
-#include "src/compiler/linkage.h"
-#include "src/compiler/pipeline.h"
-
-namespace v8 {
-namespace internal {
-namespace compiler {
-
-MachineCallHelper::MachineCallHelper(Isolate* isolate,
-                                     MachineSignature* machine_sig)
-    : CallHelper(isolate, machine_sig),
-      parameters_(NULL),
-      isolate_(isolate),
-      graph_(NULL) {}
-
-
-void MachineCallHelper::InitParameters(GraphBuilder* builder,
-                                       CommonOperatorBuilder* common) {
-  DCHECK(!parameters_);
-  graph_ = builder->graph();
-  int param_count = static_cast<int>(parameter_count());
-  if (param_count == 0) return;
-  parameters_ = graph_->zone()->NewArray<Node*>(param_count);
-  for (int i = 0; i < param_count; ++i) {
-    parameters_[i] = builder->NewNode(common->Parameter(i), graph_->start());
-  }
-}
-
-
-byte* MachineCallHelper::Generate() {
-  DCHECK(parameter_count() == 0 || parameters_ != NULL);
-  if (!Pipeline::SupportedBackend()) return NULL;
-  if (code_.is_null()) {
-    Zone* zone = graph_->zone();
-    CallDescriptor* desc =
-        Linkage::GetSimplifiedCDescriptor(zone, machine_sig_);
-    code_ = Pipeline::GenerateCodeForTesting(isolate_, desc, graph_);
-  }
-  return code_.ToHandleChecked()->entry();
-}
-
-
-Node* MachineCallHelper::Parameter(size_t index) {
-  DCHECK(parameters_);
-  DCHECK(index < parameter_count());
-  return parameters_[index];
-}
-
-}  // namespace compiler
-}  // namespace internal
-}  // namespace v8