[heap] Merge NewSpacePage into Page

src/heap/heap.h

Index: src/heap/heap.h
diff --git a/src/heap/heap.h b/src/heap/heap.h
index c9503d3e4d3d0a7114aa591a755188185101b592..60029acf8969f98d15d82fb36023229e61c966ec 100644
--- a/src/heap/heap.h
+++ b/src/heap/heap.h
@@ -323,7 +323,7 @@ class PromotionQueue {
   }
 
   Page* GetHeadPage() {
-    return Page::FromAllocationTop(reinterpret_cast<Address>(rear_));
+    return Page::FromAllocationAreaAddress(reinterpret_cast<Address>(rear_));
   }
 
   void SetNewLimit(Address limit) {
@@ -331,7 +331,7 @@ class PromotionQueue {
     if (emergency_stack_) return;
 
     // If the limit is not on the same page, we can ignore it.
-    if (Page::FromAllocationTop(limit) != GetHeadPage()) return;
+    if (Page::FromAllocationAreaAddress(limit) != GetHeadPage()) return;
 
     limit_ = reinterpret_cast<struct Entry*>(limit);