[turbofan] Add support for ChangeTaggedToUint32 in ChangeLowering.

src/compiler/change-lowering.h

Index: src/compiler/change-lowering.h
diff --git a/src/compiler/change-lowering.h b/src/compiler/change-lowering.h
index 9601b554d6f9afb0324a0fa0037fe8933d4e6c23..83526317947c6c1c872d94d52892ef7738f6ac5f 100644
--- a/src/compiler/change-lowering.h
+++ b/src/compiler/change-lowering.h
@@ -26,11 +26,15 @@ class ChangeLowering V8_FINAL : public Reducer {
 
   virtual Reduction Reduce(Node* node) V8_OVERRIDE;
 
- protected:
+ private:
   Node* HeapNumberValueIndexConstant();
   Node* SmiMaxValueConstant();
   Node* SmiShiftBitsConstant();
 
+  Node* AllocateHeapNumberWithValue(Node* value, Node* control);
+  Node* ChangeSmiToInt32(Node* value);
+  Node* LoadHeapNumberValue(Node* value, Node* control);
+
   Reduction ChangeBitToBool(Node* val, Node* control);
   Reduction ChangeBoolToBit(Node* val);
   Reduction ChangeFloat64ToTagged(Node* val, Node* control);
@@ -46,9 +50,6 @@ class ChangeLowering V8_FINAL : public Reducer {
   CommonOperatorBuilder* common() const;
   MachineOperatorBuilder* machine() const { return machine_; }
 
- private:
-  Node* AllocateHeapNumberWithValue(Node* value, Node* control);
-
   JSGraph* jsgraph_;
   Linkage* linkage_;
   MachineOperatorBuilder* machine_;