Introduce State to DriveIntegrationService.

chrome/browser/chromeos/drive/drive_integration_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_DRIVE_DRIVE_INTEGRATION_SERVICE_H_
 #define CHROME_BROWSER_CHROMEOS_DRIVE_DRIVE_INTEGRATION_SERVICE_H_
 
 #include "base/callback.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/singleton.h"
@@ skipping 92 matching lines @@
   JobListInterface* job_list() { return scheduler_.get(); }
 
   // Clears all the local cache file, the local resource metadata, and
   // in-memory Drive app registry, and remounts the file system. |callback|
   // is called with true when this operation is done successfully. Otherwise,
   // |callback| is called with false. |callback| must not be null.
   void ClearCacheAndRemountFileSystem(
       const base::Callback<void(bool)>& callback);
 
  private:
+  enum State {
+    NOT_INITIALIZED,
+    INITIALIZING,
+    INITIALIZED,
+    REMOUNTING,
+  };
+
   // Returns true if Drive is enabled.
   // Must be called on UI thread.
   bool IsDriveEnabled();
 
   // Registers remote file system for drive mount point.
   void AddDriveMountPoint();
   // Unregisters drive mount point from File API.
   void RemoveDriveMountPoint();
 
   // Adds back the drive mount point.
   // Used to implement ClearCacheAndRemountFileSystem().
   void AddBackDriveMountPoint(const base::Callback<void(bool)>& callback,
                               bool success);
 
   // Called when metadata initialization is done. Continues initialization if
   // the metadata initialization is successful.
   void InitializeAfterMetadataInitialized(FileError error);
 
   friend class DriveIntegrationServiceFactory;
 
   Profile* profile_;
-  bool is_initialized_;
+  State state_;
 
   base::FilePath cache_root_directory_;
   scoped_refptr<base::SequencedTaskRunner> blocking_task_runner_;
   scoped_ptr<internal::ResourceMetadataStorage,
              util::DestroyHelper> metadata_storage_;
   scoped_ptr<internal::FileCache, util::DestroyHelper> cache_;
   scoped_ptr<DriveServiceInterface> drive_service_;
   scoped_ptr<JobScheduler> scheduler_;
   scoped_ptr<DriveAppRegistry> drive_app_registry_;
   scoped_ptr<internal::ResourceMetadata,
@@ skipping 60 matching lines @@
   // BrowserContextKeyedServiceFactory:
   virtual BrowserContextKeyedService* BuildServiceInstanceFor(
       content::BrowserContext* context) const OVERRIDE;
 
   FactoryCallback factory_for_test_;
 };
 
 }  // namespace drive
 
 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_DRIVE_INTEGRATION_SERVICE_H_