Integrate the new DomStorage backend into DRT and test_shell.

webkit/dom_storage/dom_storage_types.h

Index: webkit/dom_storage/dom_storage_types.h
===================================================================
--- webkit/dom_storage/dom_storage_types.h	(revision 124232)
+++ webkit/dom_storage/dom_storage_types.h	(working copy)
@@ -12,6 +12,13 @@
 #include "base/nullable_string16.h"
 #include "base/string16.h"
 
+// Note: This flag should remain undefined until we're
+// ready to use the new backend in chrome and test_shell/DRT.
+// This allows us to commit changes behind the flag incrementally
+// on trunk, and to enable it in interim snapshots for try runs,
+// but to not affect the real build until its ready.
+#undef ENABLE_NEW_DOM_STORAGE_BACKEND
+
 namespace dom_storage {
 
 // The quota for each storage area. Suggested by the spec.