[turbofan] Fix truncation/representation sloppiness wrt. bool/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 76f2cb4fd1468759918b21f225ec135aa931ae97..32a7bcc56024e7895301dc172e3cea86f3c5eb93 100644
--- a/src/compiler/simplified-operator-reducer.h
+++ b/src/compiler/simplified-operator-reducer.h
@@ -13,6 +13,7 @@ namespace internal {
 
 // Forward declarations.
 class Factory;
+class Heap;
 
 namespace compiler {
 
@@ -30,7 +31,6 @@ 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);