[heap] Decouple old generation allocation limit from external memory.

src/heap/heap-inl.h

 // 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.
 
 #ifndef V8_HEAP_HEAP_INL_H_
 #define V8_HEAP_HEAP_INL_H_
 
 #include <cmath>
 
 #include "src/base/platform/platform.h"
@@ skipping 174 matching lines @@
 
 Address* Heap::OldSpaceAllocationLimitAddress() {
   return old_space_->allocation_limit_address();
 }
 
 bool Heap::HeapIsFullEnoughToStartIncrementalMarking(intptr_t limit) {
   if (FLAG_stress_compaction && (gc_count_ & 1) != 0) return true;
 
   intptr_t adjusted_allocation_limit = limit - new_space_->Capacity();
 
-  if (PromotedTotalSize() >= adjusted_allocation_limit) return true;
+  if (PromotedSpaceSizeOfObjects() >= adjusted_allocation_limit) return true;
 
   if (HighMemoryPressure()) return true;
 
   return false;
 }
 
 void Heap::UpdateNewSpaceAllocationCounter() {
   new_space_allocation_counter_ = NewSpaceAllocationCounter();
 }
 
@@ skipping 675 matching lines @@
 
 void VerifySmisVisitor::VisitPointers(Object** start, Object** end) {
   for (Object** current = start; current < end; current++) {
     CHECK((*current)->IsSmi());
   }
 }
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_HEAP_INL_H_