Revert 214254 "Add initial prototype for the GN meta-buildsystem."

trunk/src/tools/gn/item_node.cc

-// Copyright (c) 2013 The Chromium 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 "tools/gn/item_node.h"
-
-#include <algorithm>
-
-#include "base/callback.h"
-#include "base/logging.h"
-#include "tools/gn/item.h"
-
-ItemNode::ItemNode(Item* i)
-    : state_(REFERENCED),
-      item_(i) {
-}
-
-ItemNode::~ItemNode() {
-}
-
-void ItemNode::AddDependency(ItemNode* node) {
-  if (direct_dependencies_.find(node) != direct_dependencies_.end())
-    return;  // Already have this dep.
-  direct_dependencies_.insert(node);
-
-  if (node->state() != RESOLVED) {
-    // Wire up the pending resolution info.
-    unresolved_dependencies_.insert(node);
-    node->waiting_on_resolution_.insert(this);
-  }
-}
-
-void ItemNode::MarkDirectDependencyResolved(ItemNode* node) {
-  DCHECK(unresolved_dependencies_.find(node) != unresolved_dependencies_.end());
-  unresolved_dependencies_.erase(node);
-}
-
-void ItemNode::SwapOutWaitingDependencySet(ItemNodeSet* out_set) {
-  waiting_on_resolution_.swap(*out_set);
-}
-
-void ItemNode::SetGenerated() {
-  state_ = GENERATED;
-}
-
-void ItemNode::SetResolved() {
-  state_ = RESOLVED;
-
-  if (!resolved_closure_.is_null())
-    resolved_closure_.Run();
-}