[proxies] Implement [[Delete]].

test/cctest/test-heap.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 893 matching lines @@
   Handle<Smi> two(Smi::FromInt(2), isolate);
 
   // check for empty
   CHECK(Just(false) == JSReceiver::HasOwnProperty(obj, first));
 
   // add first
   JSReceiver::SetProperty(obj, first, one, SLOPPY).Check();
   CHECK(Just(true) == JSReceiver::HasOwnProperty(obj, first));
 
   // delete first
-  JSReceiver::DeleteProperty(obj, first, SLOPPY).Check();
+  CHECK(Just(true) == JSReceiver::DeleteProperty(obj, first, SLOPPY));
   CHECK(Just(false) == JSReceiver::HasOwnProperty(obj, first));
 
   // add first and then second
   JSReceiver::SetProperty(obj, first, one, SLOPPY).Check();
   JSReceiver::SetProperty(obj, second, two, SLOPPY).Check();
   CHECK(Just(true) == JSReceiver::HasOwnProperty(obj, first));
   CHECK(Just(true) == JSReceiver::HasOwnProperty(obj, second));
 
   // delete first and then second
-  JSReceiver::DeleteProperty(obj, first, SLOPPY).Check();
+  CHECK(Just(true) == JSReceiver::DeleteProperty(obj, first, SLOPPY));
   CHECK(Just(true) == JSReceiver::HasOwnProperty(obj, second));
-  JSReceiver::DeleteProperty(obj, second, SLOPPY).Check();
+  CHECK(Just(true) == JSReceiver::DeleteProperty(obj, second, SLOPPY));
   CHECK(Just(false) == JSReceiver::HasOwnProperty(obj, first));
   CHECK(Just(false) == JSReceiver::HasOwnProperty(obj, second));
 
   // add first and then second
   JSReceiver::SetProperty(obj, first, one, SLOPPY).Check();
   JSReceiver::SetProperty(obj, second, two, SLOPPY).Check();
   CHECK(Just(true) == JSReceiver::HasOwnProperty(obj, first));
   CHECK(Just(true) == JSReceiver::HasOwnProperty(obj, second));
 
   // delete second and then first
-  JSReceiver::DeleteProperty(obj, second, SLOPPY).Check();
+  CHECK(Just(true) == JSReceiver::DeleteProperty(obj, second, SLOPPY));
   CHECK(Just(true) == JSReceiver::HasOwnProperty(obj, first));
-  JSReceiver::DeleteProperty(obj, first, SLOPPY).Check();
+  CHECK(Just(true) == JSReceiver::DeleteProperty(obj, first, SLOPPY));
   CHECK(Just(false) == JSReceiver::HasOwnProperty(obj, first));
   CHECK(Just(false) == JSReceiver::HasOwnProperty(obj, second));
 
   // check string and internalized string match
   const char* string1 = "fisk";
   Handle<String> s1 = factory->NewStringFromAsciiChecked(string1);
   JSReceiver::SetProperty(obj, s1, one, SLOPPY).Check();
   Handle<String> s1_string = factory->InternalizeUtf8String(string1);
   CHECK(Just(true) == JSReceiver::HasOwnProperty(obj, s1_string));
 
@@ skipping 5496 matching lines @@
   isolate->IncrementJsCallsFromApiCounter();
   isolate->IncrementJsCallsFromApiCounter();
   isolate->IncrementJsCallsFromApiCounter();
   calls_per_ms = memory_reducer->SampleAndGetJsCallsPerMs(4);
   CheckDoubleEquals(2, calls_per_ms);
 }
 
 
 }  // namespace internal
 }  // namespace v8