Merged r19591, r19599 into 3.23 branch.

src/spaces.h

Index: src/spaces.h
diff --git a/src/spaces.h b/src/spaces.h
index ee11b6b496efd27f74f5693cb124322401d4fbc6..7c650a2aca57f409831b0c0630cf0141c989f3d7 100644
--- a/src/spaces.h
+++ b/src/spaces.h
@@ -782,6 +782,12 @@ class Page : public MemoryChunk {
   // Object area size in bytes.
   static const int kNonCodeObjectAreaSize = kPageSize - kObjectStartOffset;
 
+  // Maximum object size that fits in a page. Objects larger than that size are
+  // allocated in large object space and are never moved in memory. This also
+  // applies to new space allocation, since objects are never migrated from new
+  // space to large object space.  Takes double alignment into account.
+  static const int kMaxRegularHeapObjectSize = kPageSize - kObjectStartOffset;
+
   // Maximum object size that fits in a page. Objects larger than that size
   // are allocated in large object space and are never moved in memory. This
   // also applies to new space allocation, since objects are never migrated