[NTP4] Auto-deletion of empty apps panes.

chrome/browser/ui/webui/ntp/app_launcher_handler.h

Index: chrome/browser/ui/webui/ntp/app_launcher_handler.h
diff --git a/chrome/browser/ui/webui/ntp/app_launcher_handler.h b/chrome/browser/ui/webui/ntp/app_launcher_handler.h
index 82b55fb1d71fcb3f17de08cfb446e2ac4050acf7..44e41cd96f4293eabcf68855da6474d621b04492 100644
--- a/chrome/browser/ui/webui/ntp/app_launcher_handler.h
+++ b/chrome/browser/ui/webui/ntp/app_launcher_handler.h
@@ -65,6 +65,10 @@ class AppLauncherHandler : public WebUIMessageHandler,
   // Populate the given dictionary with the web store promo content.
   void FillPromoDictionary(base::DictionaryValue* value);
 
+  // Callback for the "deleteAppsPage" message. Takes a page index as the first
+  // and only argument.
+  void HandleDeleteAppsPage(const base::ListValue* args);
+
   // Callback for the "getApps" message.
   void HandleGetApps(const base::ListValue* args);
 
@@ -93,7 +97,7 @@ class AppLauncherHandler : public WebUIMessageHandler,
   void HandlePromoSeen(const base::ListValue* args);
 
   // Callback for the "saveAppPageName" message.
-  void HandleSaveAppPageName(const base::ListValue* args);
+  void HandleSaveAppsPageName(const base::ListValue* args);
 
   // Callback for the "generateAppForLink" message.
   void HandleGenerateAppForLink(const base::ListValue* args);
@@ -117,6 +121,21 @@ class AppLauncherHandler : public WebUIMessageHandler,
     int page_index;
   };
 
+  // Removes pages with no apps when loading from saved preferences. Does its
+  // best to avoid messing up save apps page names in the process.
+  void CondenseAppsPages();
+
+  // Deletes a range of empty apps pages.
+  void DeleteAppsPageRange(const size_t index, const size_t howmany);
+
+  // Make sure that the app has a valid page index before we do anything with
+  // this data.
+  static void EnsureAppHasPageIndex(ExtensionService* service,
+                                    const std::string& id);
+
+  // Return the number apps that have the given |page_index|.
+  int GetNumberOfAppsOnPage(const int page_index) const;
+
   // Records a web store launch in the appropriate histograms. |promo_active|
   // specifies if the web store promotion was active.
   static void RecordWebStoreLaunch(bool promo_active);
@@ -196,6 +215,11 @@ class AppLauncherHandler : public WebUIMessageHandler,
   // when the app is added to the page (via getAppsCallback or appAdded).
   std::string highlight_app_id_;
 
+  // Used to determine if the current instance of AppLauncherHandler called
+  // ExtensionUninstallAccepted(). If the current one was the one that called
+  // this, we use this value to animate the removal on the attached NTP.
+  bool uninstall_from_page_;
+
   // Hold state for favicon requests.
   CancelableRequestConsumerTSimple<AppInstallInfo*> favicon_consumer_;