Purge in-memory localStorage areas if the # of areas exceeds the limit

webkit/dom_storage/dom_storage_types.h

Index: webkit/dom_storage/dom_storage_types.h
diff --git a/webkit/dom_storage/dom_storage_types.h b/webkit/dom_storage/dom_storage_types.h
index 1f663b44a36abb670172537e959af78abf50601e..e0a8509058437591511a794f75086cfeb9069e01 100644
--- a/webkit/dom_storage/dom_storage_types.h
+++ b/webkit/dom_storage/dom_storage_types.h
@@ -32,6 +32,9 @@ const int64 kLocalStorageNamespaceId = 0;
 
 const int64 kInvalidSessionStorageNamespaceId = kLocalStorageNamespaceId;
 
+// Start purging memory if the number of in-memory areas exceeds this.
+const int64 kMaxInMemoryAreas = 100;
+
 // Value to indicate an area that not be opened.
 const int kInvalidAreaId = -1;