Take the Extension Storage API out of experimental.

chrome/common/extensions/extension_permission_set_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/common/extensions/extension_permission_set.h"
 
 #include "base/json/json_value_serializer.h"
 #include "base/logging.h"
 #include "base/path_service.h"
 #include "base/utf_string_conversions.h"
@@ skipping 623 matching lines @@
   // strings associated with them.
   ExtensionAPIPermissionSet skip;
 
   // These are considered "nuisance" or "trivial" permissions that don't need
   // a prompt.
   skip.insert(ExtensionAPIPermission::kAppNotifications);
   skip.insert(ExtensionAPIPermission::kContextMenus);
   skip.insert(ExtensionAPIPermission::kIdle);
   skip.insert(ExtensionAPIPermission::kNotification);
   skip.insert(ExtensionAPIPermission::kUnlimitedStorage);
+  skip.insert(ExtensionAPIPermission::kStorage);
   skip.insert(ExtensionAPIPermission::kTts);
 
   // TODO(erikkay) add a string for this permission.
   skip.insert(ExtensionAPIPermission::kBackground);
 
   skip.insert(ExtensionAPIPermission::kClipboardWrite);
 
   // The cookie permission does nothing unless you have associated host
   // permissions.
   skip.insert(ExtensionAPIPermission::kCookie);
@@ skipping 509 matching lines @@
   AddPattern(&non_empty_extent, "http://www.google.com/*");
 
   perm_set = new ExtensionPermissionSet(
       empty_apis, non_empty_extent, empty_extent);
   EXPECT_FALSE(perm_set->IsEmpty());
 
   perm_set = new ExtensionPermissionSet(
       empty_apis, empty_extent, non_empty_extent);
   EXPECT_FALSE(perm_set->IsEmpty());
 }