Return MaybeHandle from SetElement and DeleteElement.

src/liveedit.cc

 // 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 37 matching lines @@
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
 
 
 void SetElementSloppy(Handle<JSObject> object,
                       uint32_t index,
                       Handle<Object> value) {
   // Ignore return value from SetElement. It can only be a failure if there
   // are element setters causing exceptions and the debugger context has none
   // of these.
-  Handle<Object> no_failure =
-      JSObject::SetElement(object, index, value, NONE, SLOPPY);
-  ASSERT(!no_failure.is_null());
-  USE(no_failure);
+  JSObject::SetElement(object, index, value, NONE, SLOPPY).Assert();
 }
 
 
 // A simple implementation of dynamic programming algorithm. It solves
 // the problem of finding the difference of 2 arrays. It uses a table of results
 // of subproblems. Each cell contains a number together with 2-bit flag
 // that helps building the chunk list.
 class Differencer {
  public:
   explicit Differencer(Comparator::Input* input)
@@ skipping 1933 matching lines @@
 
 bool LiveEditFunctionTracker::IsActive(Isolate* isolate) {
   return false;
 }
 
 #endif  // ENABLE_DEBUGGER_SUPPORT
 
 
 
 } }  // namespace v8::internal