[turbofan] Correctify representation changes to bit.

src/compiler/simplified-operator-reducer.h

Index: src/compiler/simplified-operator-reducer.h
diff --git a/src/compiler/simplified-operator-reducer.h b/src/compiler/simplified-operator-reducer.h
index 32a7bcc56024e7895301dc172e3cea86f3c5eb93..76f2cb4fd1468759918b21f225ec135aa931ae97 100644
--- a/src/compiler/simplified-operator-reducer.h
+++ b/src/compiler/simplified-operator-reducer.h
@@ -13,7 +13,6 @@ namespace internal {
 
 // Forward declarations.
 class Factory;
-class Heap;
 
 namespace compiler {
 
@@ -31,6 +30,7 @@ class SimplifiedOperatorReducer FINAL : public Reducer {
 
  private:
   Reduction ReduceAnyToBoolean(Node* node);
+  Reduction ReduceChangeWord32ToBit(Node* node);
 
   Reduction Change(Node* node, const Operator* op, Node* a);
   Reduction ReplaceFloat64(double value);