[heap] Old generation limit is based on capacity.

src/heap/heap.cc

 // Copyright 2012 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.
 
 #include "src/heap/heap.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/ast/scopeinfo.h"
 #include "src/base/bits.h"
@@ skipping 174 matching lines @@
   set_encountered_transition_arrays(Smi::FromInt(0));
   // Put a dummy entry in the remembered pages so we can find the list the
   // minidump even if there are no real unmapped pages.
   RememberUnmappedPage(NULL, false);
 }
 
 
 intptr_t Heap::Capacity() {
   if (!HasBeenSetUp()) return 0;
 
-  return new_space_.Capacity() + old_space_->Capacity() +
-         code_space_->Capacity() + map_space_->Capacity();
+  return new_space_.Capacity() + OldGenerationCapacity();
+}
+
+intptr_t Heap::OldGenerationCapacity() {
+  if (!HasBeenSetUp()) return 0;
+
+  return old_space_->Capacity() + code_space_->Capacity() +
+         map_space_->Capacity() + lo_space_->SizeOfObjects();
 }
 
 
 intptr_t Heap::CommittedOldGenerationMemory() {
   if (!HasBeenSetUp()) return 0;
 
   return old_space_->CommittedMemory() + code_space_->CommittedMemory() +
          map_space_->CommittedMemory() + lo_space_->Size();
 }
 
@@ skipping 6269 matching lines @@
 }
 
 
 // static
 int Heap::GetStaticVisitorIdForMap(Map* map) {
   return StaticVisitorBase::GetVisitorId(map);
 }
 
 }  // namespace internal
 }  // namespace v8