Return MaybeHandle from SetElement and DeleteElement.

src/runtime.h

Index: src/runtime.h
diff --git a/src/runtime.h b/src/runtime.h
index 9e4941779c1cffe464e6aa1547c4737331056562..74834e214487b13923765c0ba9091bc90606354c 100644
--- a/src/runtime.h
+++ b/src/runtime.h
@@ -841,13 +841,13 @@ class Runtime : public AllStatic {
       Handle<Object> value,
       PropertyAttributes attr);
 
-  MUST_USE_RESULT static MaybeObject* DeleteObjectProperty(
+  MUST_USE_RESULT static MaybeHandle<Object> DeleteObjectProperty(
       Isolate* isolate,
       Handle<JSReceiver> object,
       Handle<Object> key,
       JSReceiver::DeleteMode mode);
 
-  MUST_USE_RESULT static MaybeObject* HasObjectProperty(
+  MUST_USE_RESULT static MaybeHandle<Object> HasObjectProperty(
       Isolate* isolate,
       Handle<JSReceiver> object,
       Handle<Object> key);