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

src/compiler/node.h

Index: src/compiler/node.h
diff --git a/src/compiler/node.h b/src/compiler/node.h
index 08b775c1fff688376140e1316c236b141eca09b8..6557635a2ecfb76e60865795604316d9e2c49556 100644
--- a/src/compiler/node.h
+++ b/src/compiler/node.h
@@ -42,7 +42,8 @@ typedef uint32_t NodeId;
 class Node final {
  public:
   static Node* New(Zone* zone, NodeId id, const Operator* op, int input_count,
-                   Node** inputs, bool has_extensible_inputs);
+                   Node* const* inputs, bool has_extensible_inputs);
+  static Node* Clone(Zone* zone, NodeId id, const Node* node);
 
   bool IsDead() const { return InputCount() > 0 && !InputAt(0); }
   void Kill();
@@ -284,7 +285,7 @@ class Node final {
   void* operator new(size_t, void* location) { return location; }
 
   // Only NodeProperties should manipulate the bounds.
-  Bounds bounds() { return bounds_; }
+  Bounds bounds() const { return bounds_; }
   void set_bounds(Bounds b) { bounds_ = b; }
 
   // Only NodeMarkers should manipulate the marks on nodes.