Enable --verify-heap in release mode

src/heap-inl.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 723 matching lines @@
   HEAP->always_allocate_scope_depth_++;
 }
 
 
 AlwaysAllocateScope::~AlwaysAllocateScope() {
   HEAP->always_allocate_scope_depth_--;
   ASSERT(HEAP->always_allocate_scope_depth_ == 0);
 }
 
 
-#ifdef DEBUG
 void VerifyPointersVisitor::VisitPointers(Object** start, Object** end) {
   for (Object** current = start; current < end; current++) {
     if ((*current)->IsHeapObject()) {
       HeapObject* object = HeapObject::cast(*current);
-      ASSERT(HEAP->Contains(object));
-      ASSERT(object->map()->IsMap());
+      CHECK(HEAP->Contains(object));
+      CHECK(object->map()->IsMap());
     }
   }
 }
-#endif
 
 
 double GCTracer::SizeOfHeapObjects() {
   return (static_cast<double>(HEAP->SizeOfObjects())) / MB;
 }
 
 
 DisallowAllocationFailure::DisallowAllocationFailure() {
 #ifdef DEBUG
   old_state_ = HEAP->disallow_allocation_failure_;
@@ skipping 43 matching lines @@
 AssertNoAllocation::~AssertNoAllocation() { }
 DisableAssertNoAllocation::DisableAssertNoAllocation() { }
 DisableAssertNoAllocation::~DisableAssertNoAllocation() { }
 
 #endif
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_INL_H_