Drive: add a method to clear all local cache.

chrome/browser/chromeos/gdata/gdata_system_service.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_CHROMEOS_GDATA_GDATA_SYSTEM_SERVICE_H_
 #define CHROME_BROWSER_CHROMEOS_GDATA_GDATA_SYSTEM_SERVICE_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/singleton.h"
+#include "base/memory/weak_ptr.h"
 #include "base/threading/sequenced_worker_pool.h"
+#include "chrome/browser/chromeos/gdata/gdata_errorcode.h"
 #include "chrome/browser/profiles/profile_keyed_service.h"
 #include "chrome/browser/profiles/profile_keyed_service_factory.h"
 
 class FilePath;
 
 namespace gdata {
 
 class DocumentsServiceInterface;
 class DriveWebAppsRegistry;
 class GDataCache;
@@ skipping 11 matching lines @@
 // created per-profile.
 class GDataSystemService : public ProfileKeyedService  {
  public:
   DocumentsServiceInterface* docs_service() { return documents_service_.get(); }
   GDataCache* cache() { return cache_; }
   GDataFileSystemInterface* file_system() { return file_system_.get(); }
   GDataUploader* uploader() { return uploader_.get(); }
   GDataContactsService* contacts_service() { return contacts_service_.get(); }
   DriveWebAppsRegistry* webapps_registry() { return webapps_registry_.get(); }
 
+  // Clears all the local cache files and resets cache-related information in
+  // the memory.
+  void ClearCache(const base::Callback<void(bool)>& callback);

[satorux1, 2012/08/03 17:17:31]

I changed my mind. I think we should give it a more descriptive name.

// Clears all the local cache files and in-memory data, and remounts
// the file system.
ClearCacheAndRemountFileSystem()

[yoshiki, 2012/08/03 18:23:15]

Done.

+
   // ProfileKeyedService override:
   virtual void Shutdown() OVERRIDE;
 
  private:
   explicit GDataSystemService(Profile* profile);
   virtual ~GDataSystemService();
 
   // Initializes the object. This function should be called before any
   // other functions.
   void Initialize(DocumentsServiceInterface* documents_service,
                   const FilePath& cache_root);
 
   // Registers remote file system proxy for drive mount point.
   void AddDriveMountPoint();
   // Unregisters drive mount point from File API.
   void RemoveDriveMountPoint();
 
+  // Adds back the drive mount point. Used to implement ClearCache().
+  void AddBackDriveMountPoint(const base::Callback<void(bool)>& callback,
+                              GDataFileError error,
+                              const FilePath& file_path);
+
   friend class GDataSystemServiceFactory;
 
   Profile* profile_;
   scoped_refptr<base::SequencedTaskRunner> blocking_task_runner_;
   GDataCache* cache_;
   scoped_ptr<DocumentsServiceInterface> documents_service_;
   scoped_ptr<GDataUploader> uploader_;
   scoped_ptr<DriveWebAppsRegistry> webapps_registry_;
   scoped_ptr<GDataFileSystemInterface> file_system_;
   scoped_ptr<GDataDownloadObserver> download_observer_;
   scoped_ptr<GDataSyncClient> sync_client_;
   scoped_ptr<GDataContactsService> contacts_service_;
+  base::WeakPtrFactory<GDataSystemService> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GDataSystemService);
 };
 
 // Singleton that owns all GDataSystemServices and associates them with
 // Profiles.
 class GDataSystemServiceFactory : public ProfileKeyedServiceFactory {
  public:
   // Returns the GDataSystemService for |profile|, creating it if it is not
   // yet created.
@@ skipping 26 matching lines @@
   virtual ~GDataSystemServiceFactory();
 
   // ProfileKeyedServiceFactory:
   virtual ProfileKeyedService* BuildServiceInstanceFor(
       Profile* profile) const OVERRIDE;
 };
 
 }  // namespace gdata
 
 #endif  // CHROME_BROWSER_CHROMEOS_GDATA_GDATA_SYSTEM_SERVICE_H_