[turbofan] More "auto" keyword cleanup

src/compiler/graph.cc

 // Copyright 2013 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 "src/compiler/graph.h"
 
 #include <algorithm>
 
 #include "src/base/bits.h"
 #include "src/compiler/node.h"
 #include "src/compiler/node-properties.h"
 #include "src/compiler/verifier.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 Graph::Graph(Zone* zone)
     : zone_(zone),
       start_(nullptr),
       end_(nullptr),
       mark_max_(0),
       next_node_id_(0),
       decorators_(zone) {}
 
 
 void Graph::Decorate(Node* node) {
-  for (auto const decorator : decorators_) {
+  for (GraphDecorator* const decorator : decorators_) {
     decorator->Decorate(node);
   }
 }
 
 
 void Graph::AddDecorator(GraphDecorator* decorator) {
   decorators_.push_back(decorator);
 }
 
 
@@ skipping 29 matching lines @@
 
 NodeId Graph::NextNodeId() {
   NodeId const id = next_node_id_;
   CHECK(!base::bits::UnsignedAddOverflow32(id, 1, &next_node_id_));
   return id;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8