cros: Implement default app ordering.

chrome/browser/extensions/extension_service.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/browser/extensions/extension_service.h"
 
 #include <algorithm>
 #include <set>
 
 #include "base/basictypes.h"
@@ skipping 1953 matching lines @@
 
     if (extension_prefs_->GetDisableReasons(extension->id()) &
         Extension::DISABLE_PERMISSIONS_INCREASE) {
       extensions::AddExtensionDisabledError(this, extension);
     }
     return;
   }
 
   // All apps that are displayed in the launcher are ordered by their ordinals
   // so we must ensure they have valid ordinals.
-  if (extension->ShouldDisplayInLauncher())
-    extension_prefs_->extension_sorting()->EnsureValidOrdinals(extension->id());
+  if (extension->ShouldDisplayInLauncher()) {
+    extension_prefs_->extension_sorting()->EnsureValidOrdinals(
+        extension->id(), syncer::StringOrdinal());
+  }
 
   extensions_.Insert(scoped_extension);
   SyncExtensionChangeIfNeeded(*extension);
   NotifyExtensionLoaded(extension);
   QueueRestoreAppWindow(extension);
 }
 
 void ExtensionService::InitializePermissions(const Extension* extension) {
   // If the extension has used the optional permissions API, it will have a
   // custom set of active permissions defined in the extension prefs. Here,
@@ skipping 678 matching lines @@
                                 extension_host->extension(),
                                 NULL, FilePath());
 #endif
 }
 
 void ExtensionService::InspectExtensionHost(
     extensions::ExtensionHost* host) {
   if (host)
     DevToolsWindow::OpenDevToolsWindow(host->render_view_host());
 }