Get web app icon via FavIconHelper and auto repair/update

chrome/browser/web_applications/web_app.h

 // Copyright (c) 2009 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_WEB_APPLICATIONS_WEB_APP_H_
 #define CHROME_BROWSER_WEB_APPLICATIONS_WEB_APP_H_
 
 #include "base/file_path.h"
 #include "base/task.h"
 #include "chrome/browser/shell_integration.h"
+#include "webkit/glue/dom_operations.h"
+
+class Profile;
+class TabContents;
 
 namespace web_app {
 
 // Compute a deterministic name based on the URL. We use this pseudo name
 // as a key to store window location per application URLs in Browser and
 // as app id for BrowserWindow, shortcut and jump list.
 std::wstring GenerateApplicationNameFromURL(const GURL& url);
 
 // Callback after user dismisses CreateShortcutView. "true" indicates
 // shortcut is created successfully. Otherwise, it is false.
 typedef Callback1<bool>::Type CreateShortcutCallback;
 
 // Creates a shortcut for web application based on given shortcut data.
 // |root_dir| is used as root directory for persisted data such as icon.
 // Directory layout is similar to what Gears has, i.e. an web application's
 // file is stored under "#/host_name/scheme_port", where '#' is the
 // |root_dir|.
 void CreateShortcut(
     const FilePath& data_dir,
     const ShellIntegration::ShortcutInfo& shortcut_info,
     CreateShortcutCallback* callback);
 
 // Returns true if given url is a valid web app url.
 bool IsValidUrl(const GURL& url);
 
+// Returns data dir for web apps for given profile.
+FilePath GetDataDir(Profile* profile);
+
+// Extracts icons info from web app data. Take only square shaped icons and
+// sort them from smallest to largest.
+typedef std::vector<webkit_glue::WebApplicationInfo::IconInfo> IconInfoList;
+void GetIconsInfo(const webkit_glue::WebApplicationInfo& app_info,
+                  IconInfoList* icons);
+
+// Extracts shortcut info of given TabContents.
+void GetShortcutInfoForTab(TabContents* tab_contents,
+                           ShellIntegration::ShortcutInfo* info);
+
+// Updates web app shortcut of the TabContents. This function checks and
+// updates web app icon and shortcuts if needed. For icon, the check is based
+// on MD5 hash of icon image. For shortcuts, it checks the desktop, start menu
+// and quick launch (as well as pinned shortcut) for shortcut and only
+// updates (recreates) them if they exits.
+void UpdateShortcutForTabContents(TabContents* tab_contents);
+
 };  // namespace web_app
 
 #endif  // CHROME_BROWSER_WEB_APPLICATIONS_WEB_APP_H_