[win] Add a progress bar in the app launcher for app installs.

chrome/browser/ui/app_list/apps_model_builder.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_APP_LIST_APPS_MODEL_BUILDER_H_
 #define CHROME_BROWSER_UI_APP_LIST_APPS_MODEL_BUILDER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 22 matching lines @@
   virtual ~AppsModelBuilder();
 
   // Populates the model.
   void Build();
 
   // Called when an extension starts installing.
   void OnBeginExtensionInstall(const std::string& extension_id,
                                const std::string& extension_name,
                                const gfx::ImageSkia& installing_icon);
 
+  // Called when progress is made on an extension's download.
+  void OnDownloadProgress(const std::string& extension_id,
+                          int percent_downloaded);
+
  private:
   typedef std::vector<ExtensionAppItem*> Apps;
 
   // Adds apps in |extensions| to |apps|.
   void AddApps(const ExtensionSet* extensions, Apps* apps);
 
   // Populates the model with apps.
   void PopulateApps();
 
   // Re-sort apps in case app ordinal prefs are changed.
@@ skipping 36 matching lines @@
   // True to ignore |model_| changes.
   bool ignore_changes_;
 
   content::NotificationRegistrar registrar_;
   PrefChangeRegistrar pref_change_registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(AppsModelBuilder);
 };
 
 #endif  // CHROME_BROWSER_UI_APP_LIST_APPS_MODEL_BUILDER_H_