Revert of Merge cellspace into old pointer space

src/heap/store-buffer-inl.h

Index: src/heap/store-buffer-inl.h
diff --git a/src/heap/store-buffer-inl.h b/src/heap/store-buffer-inl.h
index 30663752895d0dd7a2bd5f02a6defd162e1c654f..806680e145d43ac066d6d92e59a757d4ff957c0c 100644
--- a/src/heap/store-buffer-inl.h
+++ b/src/heap/store-buffer-inl.h
@@ -16,6 +16,7 @@
 
 
 void StoreBuffer::Mark(Address addr) {
+  DCHECK(!heap_->cell_space()->Contains(addr));
   DCHECK(!heap_->code_space()->Contains(addr));
   Address* top = reinterpret_cast<Address*>(heap_->store_buffer_top());
   *top++ = addr;
@@ -31,7 +32,8 @@
 
 void StoreBuffer::EnterDirectlyIntoStoreBuffer(Address addr) {
   if (store_buffer_rebuilding_enabled_) {
-    SLOW_DCHECK(!heap_->code_space()->Contains(addr) &&
+    SLOW_DCHECK(!heap_->cell_space()->Contains(addr) &&
+                !heap_->code_space()->Contains(addr) &&
                 !heap_->new_space()->Contains(addr));
     Address* top = old_top_;
     *top++ = addr;