Convert app_launch_index and page_index from int to StringOrdinal.

chrome/browser/extensions/extension_prefs.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_PREFS_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_PREFS_H_
 #pragma once
 
 #include <set>
 #include <string>
@@ skipping 88 matching lines @@
   // Sets the order that toolstrip URLs appear in the shelf.
   void SetShelfToolstripOrder(const URLList& urls);
 
   // Get the order that the browser actions appear in the toolbar.
   std::vector<std::string> GetToolbarOrder();
 
   // Set the order that the browser actions appear in the toolbar.
   void SetToolbarOrder(const std::vector<std::string>& extension_ids);
 
   // Called when an extension is installed, so that prefs get created.
-  // If |page_index| is -1, and the then a page will be found for the App.
+  // If |page_index| is kUnsetIndex, and the then a page will be found
+  //  for the App.
   void OnExtensionInstalled(const Extension* extension,
                             Extension::State initial_state,
                             bool from_webstore,
-                            int page_index);
+                            std::string page_index);
 
   // Called when an extension is uninstalled, so that prefs get cleaned up.
   void OnExtensionUninstalled(const std::string& extension_id,
                               const Extension::Location& location,
                               bool external_uninstall);
 
   // Called to change the extension's state when it is enabled/disabled.
   void SetExtensionState(const std::string& extension_id, Extension::State);
 
   // Returns all installed extensions
@@ skipping 142 matching lines @@
   // purchase is made, so that when a user logs into sync with a different
   // account we can recognize the situation. The Get function returns true if
   // there was previously stored data (placing it in |result|), or false
   // otherwise. The Set will overwrite any previous login.
   bool GetWebStoreLogin(std::string* result);
   void SetWebStoreLogin(const std::string& login);
 
   // Get the application launch index for an extension with |extension_id|. This
   // determines the order of which the applications appear on the New Tab Page.
   // A value of 0 generally indicates top left. If the extension has no launch
-  // index a -1 value is returned.
-  int GetAppLaunchIndex(const std::string& extension_id);
+  // index a kUnsetIndex value is returned.
+  std::string GetAppLaunchIndex(const std::string& extension_id);
 
   // Sets a specific launch index for an extension with |extension_id|.
-  void SetAppLaunchIndex(const std::string& extension_id, int index);
+  void SetAppLaunchIndex(const std::string& extension_id,
+                         const std::string& index);
 
   // Gets the next available application launch index. This is 1 higher than the
   // highest current application launch index found for the page |on_page|.
-  int GetNextAppLaunchIndex(int on_page);
+  std::string GetNextAppLaunchIndex(std::string on_page);
 
   // Gets the page a new app should install to. Starts on page 0, and if there
   // are N or more apps on it, tries to install on the next page.
-  int GetNaturalAppPageIndex();
+  std::string GetNaturalAppPageIndex();
 
   // Sets the order the apps should be displayed in the app launcher.
   void SetAppLauncherOrder(const std::vector<std::string>& extension_ids);
 
   // Get the application page index for an extension with |extension_id|.  This
   // determines which page an app will appear on in page-based NTPs.  If
-  // the app has no page specified, -1 is returned.
-  int GetPageIndex(const std::string& extension_id);
+  // the app has no page specified, kUnsetIndex is returned.
+  std::string GetPageIndex(const std::string& extension_id);
 
   // Sets a specific page index for an extension with |extension_id|.
-  void SetPageIndex(const std::string& extension_id, int index);
+  void SetPageIndex(const std::string& extension_id,
+                    const std::string& index);
 
   // Returns true if the user repositioned the app on the app launcher via drag
   // and drop.
   bool WasAppDraggedByUser(const std::string& extension_id);
 
   // Sets a flag indicating that the user repositioned the app on the app
   // launcher by drag and dropping it.
   void SetAppDraggedByUser(const std::string& extension_id);
 
   // The extension's update URL data.  If not empty, the ExtensionUpdater
@@ skipping 103 matching lines @@
   // Reads an integer pref |pref_key| from extension with id |extension_id|.
   bool ReadExtensionPrefInteger(const std::string& extension_id,
                                 const std::string& pref_key,
                                 int* out_value);
 
   // Reads a list pref |pref_key| from extension with id |extension_id|.
   bool ReadExtensionPrefList(const std::string& extension_id,
                              const std::string& pref_key,
                              const base::ListValue** out_value);
 
+  // Reads a string pref |pref_key| from extension with id |extension_id|
+  bool ReadExtensionPrefString(const std::string& extension_id,
+                               const std::string& pref_key,
+                               std::string* out_value);
+
   // Interprets the list pref, |pref_key| in |extension_id|'s preferences, as a
   // URLPatternSet. The |valid_schemes| specify how to parse the URLPatterns.
   bool ReadExtensionPrefURLPatternSet(const std::string& extension_id,
                                       const std::string& pref_key,
                                       URLPatternSet* result,
                                       int valid_schemes);
 
   // Converts |new_value| to a list of strings and sets the |pref_key| pref
   // belonging to |extension_id|.
   void SetExtensionPrefURLPatternSet(const std::string& extension_id,
@@ skipping 37 matching lines @@
   // in a later Chrome version.
   void FixMissingPrefs(const ExtensionIdSet& extension_ids);
 
   // Installs the persistent extension preferences into |prefs_|'s extension
   // pref store. Does nothing if |extensions_disabled| is true.
   void InitPrefStore(bool extensions_disabled);
 
   // Migrates the permissions data in the pref store.
   void MigratePermissions(const ExtensionIdSet& extension_ids);
 
+  // Migrates the app launcher and page index values.
+  void MigrateAppIndex(const ExtensionIdSet& extension_ids);
+
   // Checks whether there is a state pref for the extension and if so, whether
   // it matches |check_state|.
   bool DoesExtensionHaveState(const std::string& id,
                               Extension::State check_state) const;
 
   // The pref service specific to this set of extension prefs. Owned by profile.
   PrefService* prefs_;
 
   // Base extensions install directory.
   FilePath install_directory_;
 
   // Weak pointer, owned by Profile.
   ExtensionPrefValueMap* extension_pref_value_map_;
 
   scoped_refptr<ExtensionContentSettingsStore> content_settings_store_;
 
   // The URLs of all of the toolstrips.
   URLList shelf_order_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionPrefs);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_PREFS_H_