Make sure allocated objects in PrologueCallbackAlloc and EpilogueCallbackAlloc API test are used.

test/cctest/test-api.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 18724 matching lines @@
   v8::HandleScope scope(isolate);
 
   CHECK_EQ(flags, v8::kNoGCCallbackFlags);
   CHECK_EQ(gc_callbacks_isolate, isolate);
   ++prologue_call_count_alloc;
 
   // Simulate full heap to see if we will reenter this callback
   SimulateFullSpace(CcTest::heap()->new_space());
 
   Local<Object> obj = Object::New(isolate);
-  ASSERT(!obj.IsEmpty());
+  CHECK(!obj.IsEmpty());
 
   CcTest::heap()->CollectAllGarbage(
       i::Heap::Heap::kAbortIncrementalMarkingMask);
 }
 
 
 void EpilogueCallbackAlloc(v8::Isolate* isolate,
                            v8::GCType,
                            v8::GCCallbackFlags flags) {
   v8::HandleScope scope(isolate);
 
   CHECK_EQ(flags, v8::kNoGCCallbackFlags);
   CHECK_EQ(gc_callbacks_isolate, isolate);
   ++epilogue_call_count_alloc;
 
   // Simulate full heap to see if we will reenter this callback
   SimulateFullSpace(CcTest::heap()->new_space());
 
   Local<Object> obj = Object::New(isolate);
-  ASSERT(!obj.IsEmpty());
+  CHECK(!obj.IsEmpty());
 
   CcTest::heap()->CollectAllGarbage(
       i::Heap::Heap::kAbortIncrementalMarkingMask);
 }
 
 
 TEST(GCCallbacksOld) {
   LocalContext context;
 
   v8::V8::AddGCPrologueCallback(PrologueCallback);
@@ skipping 3609 matching lines @@
   CompileRun("x1 = x2 = 0;");
   rr = v8::Promise::Resolver::New(isolate);
   rr->GetPromise()->Catch(f1)->Chain(f2);
   rr->Reject(v8::Integer::New(isolate, 3));
   CHECK_EQ(0, global->Get(v8_str("x1"))->Int32Value());
   CHECK_EQ(0, global->Get(v8_str("x2"))->Int32Value());
   V8::RunMicrotasks(isolate);
   CHECK_EQ(3, global->Get(v8_str("x1"))->Int32Value());
   CHECK_EQ(4, global->Get(v8_str("x2"))->Int32Value());
 }