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

webkit/dom_storage/dom_storage_area.h

Index: webkit/dom_storage/dom_storage_area.h
diff --git a/webkit/dom_storage/dom_storage_area.h b/webkit/dom_storage/dom_storage_area.h
index 0c0a76b5d38769b649ca0374260eac10eb365c9d..57c0e8925cd4fefd1a6accbe9a9b90f6da818f86 100644
--- a/webkit/dom_storage/dom_storage_area.h
+++ b/webkit/dom_storage/dom_storage_area.h
@@ -80,6 +80,9 @@ class WEBKIT_STORAGE_EXPORT DomStorageArea
   // no longer do anything.
   void Shutdown();
 
+  // Returns true if the data is loaded in memory.
+  bool IsLoadedInMemory() const { return is_initial_import_done_; }
+
  private:
   friend class DomStorageAreaTest;
   FRIEND_TEST_ALL_PREFIXES(DomStorageAreaTest, DomStorageAreaBasics);