[stubs] Introduce a proper ToBooleanStub.

src/factory.h

Index: src/factory.h
diff --git a/src/factory.h b/src/factory.h
index dd107d144b54bc380c0ee995c41cf43d7b459a84..8ffae5a4871885515d9d2fa9874e2f5d2e9b145b 100644
--- a/src/factory.h
+++ b/src/factory.h
@@ -16,8 +16,8 @@ namespace internal {
 class Factory final {
  public:
   Handle<Oddball> NewOddball(Handle<Map> map, const char* to_string,
-                             Handle<Object> to_number, const char* type_of,
-                             byte kind);
+                             Handle<Object> to_number, bool to_boolean,
+                             const char* type_of, byte kind);
 
   // Allocates a fixed array initialized with undefined values.
   Handle<FixedArray> NewFixedArray(