Add 'App Size' to App Info Dialog

chrome/browser/ui/views/apps/app_info_dialog/app_info_summary_panel.h

 // Copyright 2014 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_VIEWS_APPS_APP_INFO_DIALOG_APP_INFO_SUMMARY_PANEL_H_
 #define CHROME_BROWSER_UI_VIEWS_APPS_APP_INFO_DIALOG_APP_INFO_SUMMARY_PANEL_H_
 
 #include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
 #include "chrome/browser/ui/views/apps/app_info_dialog/app_info_panel.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "ui/views/controls/combobox/combobox_listener.h"
 
 class LaunchOptionsComboboxModel;
 class Profile;
 
 namespace extensions {
 class Extension;
 }
 
 namespace views {
 class Combobox;
 class Label;
 }
 
 // The summary panel of the app info dialog, which provides basic information
 // and controls related to the app.
 class AppInfoSummaryPanel : public AppInfoPanel,
-                            public views::ComboboxListener {
+                            public views::ComboboxListener,
+                            public base::SupportsWeakPtr<AppInfoSummaryPanel> {
  public:
   AppInfoSummaryPanel(Profile* profile, const extensions::Extension* app);
 
   virtual ~AppInfoSummaryPanel();
 
  private:
   // Internal initialisation methods.
   void CreateDescriptionControl();
   void CreateDetailsControl();
   void CreateLaunchOptionControl();
 
   void LayoutDescriptionControl();
   void LayoutDetailsControl();
 
   // Overridden from views::ComboboxListener:
   virtual void OnPerformAction(views::Combobox* combobox) OVERRIDE;
 
+  // Called asynchronously to calculate and update the size of the app displayed
+  // in the dialog.
+  void StartCalculatingAppSize();
+  void OnAppSizeCalculated(int64 app_size_in_bytes);
+
   // Returns the time this app was installed.
   base::Time GetInstalledTime() const;
 
   // Returns the time the app was last launched, or base::Time() if it's never
   // been launched.
   base::Time GetLastLaunchedTime() const;
 
   // Returns the launch type of the app (e.g. pinned tab, fullscreen, etc).
   extensions::LaunchType GetLaunchType() const;
 
   // Sets the launch type of the app to the given type. Must only be called if
   // CanSetLaunchType() returns true.
   void SetLaunchType(extensions::LaunchType) const;
   bool CanSetLaunchType() const;
 
   // UI elements on the dialog.
   views::Label* description_heading_;
   views::Label* description_label_;
 
   views::Label* details_heading_;
+  views::Label* size_title_;
+  views::Label* size_value_;
   views::Label* version_title_;
   views::Label* version_value_;
   views::Label* installed_time_title_;
   views::Label* installed_time_value_;
   views::Label* last_run_time_title_;
   views::Label* last_run_time_value_;
 
   scoped_ptr<LaunchOptionsComboboxModel> launch_options_combobox_model_;
   views::Combobox* launch_options_combobox_;
 
+  base::WeakPtrFactory<AppInfoSummaryPanel> weak_ptr_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(AppInfoSummaryPanel);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_APPS_APP_INFO_DIALOG_APP_INFO_SUMMARY_PANEL_H_