[heap] Remove black pages and use black areas instead.

src/heap/scavenger.cc

 // 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.
 
 #include "src/heap/scavenger.h"
 
 #include "src/contexts.h"
 #include "src/heap/heap.h"
 #include "src/heap/objects-visiting-inl.h"
 #include "src/heap/scavenger-inl.h"
@@ skipping 120 matching lines @@
     // Set the forwarding address.
     source->set_map_word(MapWord::FromForwardingAddress(target));
 
     if (logging_and_profiling_mode == LOGGING_AND_PROFILING_ENABLED) {
       // Update NewSpace stats if necessary.
       RecordCopiedObject(heap, target);
       heap->OnMoveEvent(target, source, size);
     }
 
     if (marks_handling == TRANSFER_MARKS) {
-      if (IncrementalMarking::TransferColor(source, target)) {
-        MemoryChunk::IncrementLiveBytesFromGC(target, size);
-      }
+      IncrementalMarking::TransferColor(source, target, size);
     }
   }
 
   template <AllocationAlignment alignment>
   static inline bool SemiSpaceCopyObject(Map* map, HeapObject** slot,
                                          HeapObject* object, int object_size) {
     Heap* heap = map->GetHeap();
 
     DCHECK(heap->AllowedToBeMigrated(object, NEW_SPACE));
     AllocationResult allocation =
@@ skipping 290 matching lines @@
 void ScavengeVisitor::ScavengePointer(Object** p) {
   Object* object = *p;
   if (!heap_->InNewSpace(object)) return;
 
   Scavenger::ScavengeObject(reinterpret_cast<HeapObject**>(p),
                             reinterpret_cast<HeapObject*>(object));
 }
 
 }  // namespace internal
 }  // namespace v8