Object::GetElements() and friends maybehandlification.

src/elements.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 55 matching lines @@
       Handle<JSObject> holder,
       uint32_t key) {
     return HasElement(receiver, holder, key, handle(holder->elements()));
   }
 
   // Returns the element with the specified key or undefined if there is no such
   // element. This method doesn't iterate up the prototype chain.  The caller
   // can optionally pass in the backing store to use for the check, which must
   // be compatible with the ElementsKind of the ElementsAccessor. If
   // backing_store is NULL, the holder->elements() is used as the backing store.
-  MUST_USE_RESULT virtual Handle<Object> Get(
+  MUST_USE_RESULT virtual MaybeHandle<Object> Get(
       Handle<Object> receiver,
       Handle<JSObject> holder,
       uint32_t key,
       Handle<FixedArrayBase> backing_store) = 0;
 
-  MUST_USE_RESULT inline Handle<Object> Get(
+  MUST_USE_RESULT inline MaybeHandle<Object> Get(
       Handle<Object> receiver,
       Handle<JSObject> holder,
       uint32_t key) {
     return Get(receiver, holder, key, handle(holder->elements()));
   }
 
   // Returns an element's attributes, or ABSENT if there is no such
   // element. This method doesn't iterate up the prototype chain.  The caller
   // can optionally pass in the backing store to use for the check, which must
   // be compatible with the ElementsKind of the ElementsAccessor. If
@@ skipping 106 matching lines @@
       int copy_size) = 0;
 
   inline void CopyElements(
       Handle<JSObject> from_holder,
       Handle<FixedArrayBase> to,
       ElementsKind from_kind) {
     CopyElements(
       *from_holder, 0, from_kind, to, 0, kCopyToEndAndInitializeToHole);
   }
 
-  virtual Handle<FixedArray> AddElementsToFixedArray(
+  MUST_USE_RESULT virtual MaybeHandle<FixedArray> AddElementsToFixedArray(
       Handle<Object> receiver,
       Handle<JSObject> holder,
       Handle<FixedArray> to,
       Handle<FixedArrayBase> from) = 0;
 
-  inline Handle<FixedArray> AddElementsToFixedArray(
+  MUST_USE_RESULT inline MaybeHandle<FixedArray> AddElementsToFixedArray(
       Handle<Object> receiver,
       Handle<JSObject> holder,
       Handle<FixedArray> to) {
     return AddElementsToFixedArray(
         receiver, holder, to, handle(holder->elements()));
   }
 
   // Returns a shared ElementsAccessor for the specified ElementsKind.
   static ElementsAccessor* ForKind(ElementsKind elements_kind) {
     ASSERT(elements_kind < kElementsKindCount);
@@ skipping 31 matching lines @@
 void CheckArrayAbuse(Handle<JSObject> obj, const char* op, uint32_t key,
                      bool allow_appending = false);
 
 MUST_USE_RESULT MaybeHandle<Object> ArrayConstructInitializeElements(
     Handle<JSArray> array,
     Arguments* args);
 
 } }  // namespace v8::internal
 
 #endif  // V8_ELEMENTS_H_