Object::GetElements() and friends maybehandlification.

src/runtime.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 805 matching lines @@
                          Handle<String> pat,
                          int index);
 
   static bool IsUpperCaseChar(RuntimeState* runtime_state, uint16_t ch);
 
   // TODO(1240886): Some of the following methods are *not* handle safe, but
   // accept handle arguments. This seems fragile.
 
   // Support getting the characters in a string using [] notation as
   // in Firefox/SpiderMonkey, Safari and Opera.
-  static Handle<Object> GetElementOrCharAt(Isolate* isolate,
-                                           Handle<Object> object,
-                                           uint32_t index);
+  MUST_USE_RESULT static MaybeHandle<Object> GetElementOrCharAt(
+      Isolate* isolate,
+      Handle<Object> object,
+      uint32_t index);
 
   MUST_USE_RESULT static MaybeHandle<Object> SetObjectProperty(
       Isolate* isolate,
       Handle<Object> object,
       Handle<Object> key,
       Handle<Object> value,
       PropertyAttributes attr,
       StrictMode strict_mode);
 
   MUST_USE_RESULT static MaybeHandle<Object> ForceSetObjectProperty(
       Handle<JSObject> object,
       Handle<Object> key,
       Handle<Object> value,
       PropertyAttributes attr);
 
   MUST_USE_RESULT static MaybeHandle<Object> DeleteObjectProperty(
       Isolate* isolate,
       Handle<JSReceiver> object,
       Handle<Object> key,
       JSReceiver::DeleteMode mode);
 
   MUST_USE_RESULT static MaybeHandle<Object> HasObjectProperty(
       Isolate* isolate,
       Handle<JSReceiver> object,
       Handle<Object> key);
 
-  static Handle<Object> GetObjectProperty(Isolate* isolate,
-                                          Handle<Object> object,
-                                          Handle<Object> key);
+  MUST_USE_RESULT static MaybeHandle<Object> GetObjectProperty(
+      Isolate* isolate,
+      Handle<Object> object,
+      Handle<Object> key);
 
   static void SetupArrayBuffer(Isolate* isolate,
                                Handle<JSArrayBuffer> array_buffer,
                                bool is_external,
                                void* data,
                                size_t allocated_length);
 
   static bool SetupArrayBufferAllocatingData(
       Isolate* isolate,
       Handle<JSArrayBuffer> array_buffer,
@@ skipping 43 matching lines @@
 class AllocateDoubleAlignFlag:  public BitField<bool,            0, 1> {};
 class AllocateTargetSpace:      public BitField<AllocationSpace, 1, 3> {};
 
 class DeclareGlobalsEvalFlag:   public BitField<bool,       0, 1> {};
 class DeclareGlobalsNativeFlag: public BitField<bool,       1, 1> {};
 class DeclareGlobalsStrictMode: public BitField<StrictMode, 2, 1> {};
 
 } }  // namespace v8::internal
 
 #endif  // V8_RUNTIME_H_