[turbofan] Initial import of SimplifiedOperatorReducer.

test/compiler-unittests/machine-operator-reducer-unittest.cc

Index: test/compiler-unittests/machine-operator-reducer-unittest.cc
diff --git a/test/compiler-unittests/machine-operator-reducer-unittest.cc b/test/compiler-unittests/machine-operator-reducer-unittest.cc
index 75c85623de8760132211f614440dedbd1a7a7ae2..6621c53f73f54a5369ea0f9486217f0ff1adc59a 100644
--- a/test/compiler-unittests/machine-operator-reducer-unittest.cc
+++ b/test/compiler-unittests/machine-operator-reducer-unittest.cc
@@ -17,13 +17,6 @@ class MachineOperatorReducerTest : public GraphTest {
   virtual ~MachineOperatorReducerTest() {}
 
  protected:
-  Node* Parameter(int32_t index) {
-    return graph()->NewNode(common()->Parameter(index), graph()->start());
-  }
-  Node* Int32Constant(int32_t value) {
-    return graph()->NewNode(common()->Int32Constant(value));
-  }
-
   Reduction Reduce(Node* node) {
     MachineOperatorReducer reducer(graph());
     return reducer.Reduce(node);