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

webkit/dom_storage/dom_storage_namespace.h

Index: webkit/dom_storage/dom_storage_namespace.h
diff --git a/webkit/dom_storage/dom_storage_namespace.h b/webkit/dom_storage/dom_storage_namespace.h
index 78ef4d77ff10b690dd39f97b569f17e4686a4632..d9521a771f0a2de18207691c24ec0c2f6c9f9d6b 100644
--- a/webkit/dom_storage/dom_storage_namespace.h
+++ b/webkit/dom_storage/dom_storage_namespace.h
@@ -59,9 +59,12 @@ class WEBKIT_STORAGE_EXPORT DomStorageNamespace
 
   void DeleteLocalStorageOrigin(const GURL& origin);
   void DeleteSessionStorageOrigin(const GURL& origin);
+  void PurgeUnopenedAreas();
   void PurgeMemory();
   void Shutdown();
 
+  unsigned int CountInMemoryAreas() const { return areas_.size(); }

[michaeln, 2013/04/05 23:39:23]

Unfortunately, I don't think this is an accurate count. There can be 'areas' in
the set that are not loaded into memory (as in after the existing PurgeMemory()
method has been called).

[kinuko, 2013/04/10 07:04:14]

Good point, I changed the code to iterate over areas_ to count up areas who have
in-memory data. (Is there a better way to do this?)

+
  private:
   friend class base::RefCountedThreadSafe<DomStorageNamespace>;