Enable DOM_STORAGE in our build.

webkit/glue/webpreferences.h

Index: webkit/glue/webpreferences.h
===================================================================
--- webkit/glue/webpreferences.h	(revision 21124)
+++ webkit/glue/webpreferences.h	(working copy)
@@ -42,6 +42,8 @@
   bool uses_page_cache;
   bool remote_fonts_enabled;
   bool xss_auditor_enabled;
+  bool local_storage_enabled;
+  bool session_storage_enabled;
 
   // TODO(tc): User style sheets will not work in chrome because it tries to
   // load the style sheet using a request without a frame.
@@ -79,6 +81,8 @@
         uses_page_cache(false),
         remote_fonts_enabled(false),
         xss_auditor_enabled(false),
+        local_storage_enabled(false),
+        session_storage_enabled(false),
         user_style_sheet_enabled(false) {
   }
 };