[turbofan] Preserve Bounds when cloning nodes in the scheduler.

src/compiler/graph.cc

Index: src/compiler/graph.cc
diff --git a/src/compiler/graph.cc b/src/compiler/graph.cc
index 327fb5853c0690997ffabc6383441338dd01b4b2..00074b55135e9a620619836d791250d130f1e59a 100644
--- a/src/compiler/graph.cc
+++ b/src/compiler/graph.cc
@@ -51,6 +51,14 @@ Node* Graph::NewNode(const Operator* op, int input_count, Node** inputs,
 }
 
 
+Node* Graph::CloneNode(const Node* node) {
+  DCHECK_NOT_NULL(node);
+  Node* const clone = Node::Clone(zone(), NextNodeId(), node);
+  Decorate(clone);
+  return clone;
+}
+
+
 NodeId Graph::NextNodeId() {
   NodeId const id = next_node_id_;
   CHECK(!base::bits::UnsignedAddOverflow32(id, 1, &next_node_id_));