[fullcodegen] Cleanup MustCreateObjectLiteralWithRuntime.

src/ast/ast.h

Index: src/ast/ast.h
diff --git a/src/ast/ast.h b/src/ast/ast.h
index d182b399f7e6c00f47f47258a888334833a478f4..b2103b04e32d747afbc44070fe9e3b5bdba276af 100644
--- a/src/ast/ast.h
+++ b/src/ast/ast.h
@@ -1517,6 +1517,9 @@ class ObjectLiteral final : public MaterializedLiteral {
   bool may_store_doubles() const { return may_store_doubles_; }
   bool has_function() const { return has_function_; }
   bool has_elements() const { return has_elements_; }
+  bool has_shallow_properties() const {
+    return depth() == 1 && !has_elements() && !may_store_doubles();
+  }
 
   // Decide if a property should be in the object boilerplate.
   static bool IsBoilerplateProperty(Property* property);
@@ -1533,7 +1536,7 @@ class ObjectLiteral final : public MaterializedLiteral {
   int ComputeFlags(bool disable_mementos = false) const {
     int flags = fast_elements() ? kFastElements : kNoFlags;
     flags |= has_function() ? kHasFunction : kNoFlags;
-    if (depth() == 1 && !has_elements() && !may_store_doubles()) {
+    if (has_shallow_properties()) {
       flags |= kShallowProperties;
     }
     if (disable_mementos) {