[heap] Fix a missing write barrier in Heap::Allocate.

test/cctest/heap/heap-tester.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef HEAP_HEAP_TESTER_H_
 #define HEAP_HEAP_TESTER_H_
 
 #include "src/heap/spaces.h"
 
 // Tests that should have access to private methods of {v8::internal::Heap}.
@@ skipping 16 matching lines @@
   V(ResetWeakHandle)                                      \
   V(StressHandles)                                        \
   V(TestMemoryReducerSampleJsCalls)                       \
   V(TestSizeOfObjects)                                    \
   V(Regress587004)                                        \
   V(Regress538257)                                        \
   V(Regress589413)                                        \
   V(Regress658718)                                        \
   V(Regress670675)                                        \
   V(Regress5831)                                          \
+  V(RegressMissingWriteBarrierInAllocate)                 \
   V(WriteBarriersInCopyJSObject)
 
 #define HEAP_TEST(Name)                                                       \
   CcTest register_test_##Name(v8::internal::HeapTester::Test##Name, __FILE__, \
                               #Name, true, true);                             \
   void v8::internal::HeapTester::Test##Name()
 
 #define UNINITIALIZED_HEAP_TEST(Name)                                         \
   CcTest register_test_##Name(v8::internal::HeapTester::Test##Name, __FILE__, \
                               #Name, true, false);                            \
@@ skipping 23 matching lines @@
   static Handle<Object> TestAllocateAfterFailures();
 
   /* test-api.cc */
   static void ResetWeakHandle(bool global_gc);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // HEAP_HEAP_TESTER_H_