[turbofan] Cache for reusing value vector nodes in frame states.

src/compiler/instruction-selector.h

Index: src/compiler/instruction-selector.h
diff --git a/src/compiler/instruction-selector.h b/src/compiler/instruction-selector.h
index b6278b1f35d39a5e27fcd6e295c34304c23ed28b..92979beb8e72c8fa5987c16aa0ae0389104c37a1 100644
--- a/src/compiler/instruction-selector.h
+++ b/src/compiler/instruction-selector.h
@@ -171,8 +171,6 @@ class InstructionSelector FINAL {
                             bool call_address_immediate);
 
   FrameStateDescriptor* GetFrameStateDescriptor(Node* node);
-  void FillTypeVectorFromStateValues(ZoneVector<MachineType>* parameters,
-                                     Node* state_values);
   void AddFrameStateInputs(Node* state, InstructionOperandVector* inputs,
                            FrameStateDescriptor* descriptor);
   MachineType GetMachineType(Node* node);