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

src/heap/spaces-inl.h

Index: src/heap/spaces-inl.h
diff --git a/src/heap/spaces-inl.h b/src/heap/spaces-inl.h
index 1ee0f0bf910d095386ec79b4519645a8a4f274aa..0fd69dacfebd7b93b269bd9b093b53e39bca4866 100644
--- a/src/heap/spaces-inl.h
+++ b/src/heap/spaces-inl.h
@@ -34,7 +34,6 @@ NewSpacePageRange::NewSpacePageRange(Address start, Address limit)
   SemiSpace::AssertValidRange(start, limit);
 }
 
-
 // -----------------------------------------------------------------------------
 // SemiSpaceIterator
 
@@ -242,7 +241,6 @@ void MemoryChunk::ResetLiveBytes() {
 }
 
 void MemoryChunk::IncrementLiveBytes(int by) {
-  if (IsFlagSet(BLACK_PAGE)) return;
   if (FLAG_trace_live_bytes) {
     PrintIsolate(
         heap()->isolate(), "live-bytes: update page=%p delta=%d %d->%d\n",
@@ -444,6 +442,12 @@ AllocationResult PagedSpace::AllocateRawUnaligned(
     if (object == NULL) {
       object = SlowAllocateRaw(size_in_bytes);
     }
+    if (object != NULL) {
+      if (heap()->incremental_marking()->black_allocation()) {
+        Marking::MarkBlack(ObjectMarking::MarkBitFrom(object));
+        MemoryChunk::IncrementLiveBytesFromGC(object, size_in_bytes);
+      }
+    }
   }
 
   if (object != NULL) {