Separate the NTP app ordering from the app list app ordering

chrome/browser/ui/app_list/extension_app_item.h

Index: chrome/browser/ui/app_list/extension_app_item.h
diff --git a/chrome/browser/ui/app_list/extension_app_item.h b/chrome/browser/ui/app_list/extension_app_item.h
index d2c4b098bbf8f5f4f0cbb5c697e9da1808b4d8e5..6a8a4e521078589a94f62a1511e8e7664caf3c0f 100644
--- a/chrome/browser/ui/app_list/extension_app_item.h
+++ b/chrome/browser/ui/app_list/extension_app_item.h
@@ -45,9 +45,6 @@ class ExtensionAppItem : public ChromeAppListItem,
   // Reload the title and icon from the underlying extension.
   void Reload();
 
-  syncer::StringOrdinal GetPageOrdinal() const;
-  syncer::StringOrdinal GetAppLaunchOrdinal() const;
-
   // Update page and app launcher ordinals to put the app in between |prev| and
   // |next|. Note that |prev| and |next| could be NULL when the app is put at
   // the beginning or at the end.
@@ -57,6 +54,14 @@ class ExtensionAppItem : public ChromeAppListItem,
   // it gray.
   void UpdateIcon();
 
+  // Returns true if this ExtensionAppItem precedes |item| in the app list app
+  // ordering. The item's extension id must be in the app list ordering.
+  bool Precedes(const ExtensionAppItem* item) const;
+
+  // Returns true if thie ExtensionAppItem's extension id is in the app list app
+  // ordering.
+  bool ExistsInSorting();
+
   const std::string& extension_id() const { return extension_id_; }
 
  private: