[turbofan] Initial attempt to cleanup Node and related classes.

src/compiler/js-inlining.cc

 // Copyright 2014 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/ast.h"
 #include "src/ast-numbering.h"
 #include "src/compiler/access-builder.h"
 #include "src/compiler/ast-graph-builder.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/graph-inl.h"
@@ skipping 389 matching lines @@
   Inlinee inlinee(visitor.GetCopy(graph.start()), visitor.GetCopy(graph.end()));
 
   if (FLAG_turbo_deoptimization) {
     Node* outer_frame_state = call.frame_state();
     // Insert argument adaptor frame if required.
     if (call.formal_arguments() != inlinee.formal_parameters()) {
       outer_frame_state =
           CreateArgumentsAdaptorFrameState(&call, function, info.zone());
     }
 
-    for (NodeVectorConstIter it = visitor.copies().begin();
-         it != visitor.copies().end(); ++it) {
-      Node* node = *it;
-      if (node != NULL && node->opcode() == IrOpcode::kFrameState) {
+    for (Node* node : visitor.copies()) {
+      if (node && node->opcode() == IrOpcode::kFrameState) {
         AddClosureToFrameState(node, function);
         NodeProperties::ReplaceFrameStateInput(node, outer_frame_state);
       }
     }
   }
 
   inlinee.InlineAtCall(jsgraph_, call_node);
 }
 
 
@@ skipping 56 matching lines @@
              info_->shared_info()->DebugName()->ToCString().get());
     }
     NodeProperties::ReplaceWithValue(call_node, r.first, r.second);
     call_node->RemoveAllInputs();
     DCHECK_EQ(0, call_node->UseCount());
   }
 }
 }
 }
 }  // namespace v8::internal::compiler