[turbofan] Make Node::set_op safer via wrapper.

src/compiler/osr.cc

Index: src/compiler/osr.cc
diff --git a/src/compiler/osr.cc b/src/compiler/osr.cc
index 43e139d25033bdeeff2ac511257f1c7044e39b12..77eea3ce2ce6538dca48336ed2a8d643d5d522f3 100644
--- a/src/compiler/osr.cc
+++ b/src/compiler/osr.cc
@@ -237,7 +237,7 @@ static void PeelOuterLoopsForOsr(Graph* graph, CommonOperatorBuilder* common,
     NodeId const id = end->InputAt(i)->id();
     for (NodeVector* const copy : copies) {
       end->AppendInput(graph->zone(), copy->at(id));
-      end->set_op(common->End(end->InputCount()));
+      NodeProperties::ChangeOp(end, common->End(end->InputCount()));
     }
   }
 
@@ -301,12 +301,14 @@ void OsrHelper::Deconstruct(JSGraph* jsgraph, CommonOperatorBuilder* common,
   CHECK_NE(0, live_input_count);
   for (Node* const use : osr_loop->uses()) {
     if (NodeProperties::IsPhi(use)) {
-      use->set_op(common->ResizeMergeOrPhi(use->op(), live_input_count));
       use->RemoveInput(0);
+      NodeProperties::ChangeOp(
+          use, common->ResizeMergeOrPhi(use->op(), live_input_count));
     }
   }
-  osr_loop->set_op(common->ResizeMergeOrPhi(osr_loop->op(), live_input_count));
   osr_loop->RemoveInput(0);
+  NodeProperties::ChangeOp(
+      osr_loop, common->ResizeMergeOrPhi(osr_loop->op(), live_input_count));
 
   // Run control reduction and graph trimming.
   // TODO(bmeurer): The OSR deconstruction could be a regular reducer and play