Added refresh on filesystem change

chrome/browser/chromeos/extensions/file_browser_event_router.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_CHROMEOS_EXTENSIONS_FILE_BROWSER_EVENT_ROUTER_H_
 #define CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_BROWSER_EVENT_ROUTER_H_
 #pragma once
 
 #include <map>
 #include <set>
@@ skipping 42 matching lines @@
                              const std::string& device_path) OVERRIDE;
 
   virtual void MountCompleted(chromeos::MountLibrary::MountEvent event_type,
       chromeos::MountError error_code,
       const chromeos::MountLibrary::MountPointInfo& mount_info) OVERRIDE;
 
  private:
   typedef std::map<std::string, linked_ptr<chromeos::SystemNotification> >
       NotificationMap;
   typedef std::map<std::string, std::string> MountPointMap;
+  typedef std::map<std::string, int> ExtensionUsageRegistry;
+
   typedef struct FileWatcherExtensions {

[zel, 2011/09/12 15:58:42]

let's make this a class now since it's not just collection of data members
anymore

[Dmitry Zvorygin, 2011/09/14 10:15:49]

Done.

     FileWatcherExtensions(const FilePath& path,
-        const std::string& extension_id) {
-      file_watcher.reset(new base::files::FilePathWatcher());
-      virtual_path = path;
-      extensions.insert(extension_id);
-    }
+        const std::string& extension_id);
+
     ~FileWatcherExtensions() {}
     linked_ptr<base::files::FilePathWatcher> file_watcher;
     FilePath local_path;
     FilePath virtual_path;
-    std::set<std::string> extensions;
+
+    void AddExtension(const std::string& extension_id);
+
+    void RemoveExtension(const std::string& extension_id);
+
+    const ExtensionUsageRegistry& GetExtensions() const;
+
+    unsigned int GetRefCount() const;
+
+   private:
+    ExtensionUsageRegistry extensions;
+    unsigned int ref_count;
   } FileWatcherProcess;
   typedef std::map<FilePath, FileWatcherExtensions*> WatcherMap;
 
   // Helper class for passing through file watch notification events.
   class FileWatcherDelegate : public base::files::FilePathWatcher::Delegate {
    public:
     explicit FileWatcherDelegate(ExtensionFileBrowserEventRouter* router);
 
    private:
     // base::files::FilePathWatcher::Delegate overrides.
@@ skipping 20 matching lines @@
   // Finds first notifications corresponding to the same device. Ensures that
   // we don't pop up multiple notifications for the same device.
   NotificationMap::iterator FindNotificationForId(const std::string& path);
 
   // Process file watch notifications.
   void HandleFileWatchNotification(const FilePath& path,
                                    bool got_error);
 
   // Sends folder change event.
   void DispatchFolderChangeEvent(const FilePath& path, bool error,
-                                 const std::set<std::string>& extensions);
+                                 const ExtensionUsageRegistry& extensions);
 
   // Sends filesystem changed extension message to all renderers.
   void DispatchMountEvent(const chromeos::MountLibrary::Disk* disk, bool added);
 
   void DispatchMountCompletedEvent(chromeos::MountLibrary::MountEvent event,
       chromeos::MountError error_code,
       const chromeos::MountLibrary::MountPointInfo& mount_info);
 
   void RemoveBrowserFromVector(const std::string& path);
 
@@ skipping 16 matching lines @@
   MountPointMap mounted_devices_;
   NotificationMap notifications_;
   WatcherMap file_watchers_;
   Profile* profile_;
   base::Lock lock_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionFileBrowserEventRouter);
 };
 
 #endif  // CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_BROWSER_EVENT_ROUTER_H_