Add events for configuring and adding new providers to FSP API.

chrome/browser/chromeos/file_system_provider/throttled_file_system.h

 // Copyright 2015 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_FILE_SYSTEM_PROVIDER_THROTTLED_FILE_SYSTEM_H_
 #define CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_THROTTLED_FILE_SYSTEM_H_
 
 #include <set>
 #include <string>
 
@@ skipping 99 matching lines @@
   Watchers* GetWatchers() override;
   const OpenedFiles& GetOpenedFiles() const override;
   void AddObserver(ProvidedFileSystemObserver* observer) override;
   void RemoveObserver(ProvidedFileSystemObserver* observer) override;
   void Notify(const base::FilePath& entry_path,
               bool recursive,
               storage::WatcherManager::ChangeType change_type,
               scoped_ptr<ProvidedFileSystemObserver::Changes> changes,
               const std::string& tag,
               const storage::AsyncFileUtil::StatusCallback& callback) override;
+  void Configure(
+      const storage::AsyncFileUtil::StatusCallback& callback) override;
   base::WeakPtr<ProvidedFileSystemInterface> GetWeakPtr() override;
 
  private:
   // Called when an operation enqueued with |queue_token| is aborted.
   void Abort(int queue_token);
 
   // Called when opening a file is completed with either a success or an error.
   void OnOpenFileCompleted(int queue_token,
                            const OpenFileCallback& callback,
                            int file_handle,
@@ skipping 12 matching lines @@
   std::map<int, int> opened_files_;
 
   base::WeakPtrFactory<ThrottledFileSystem> weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(ThrottledFileSystem);
 };
 
 }  // namespace file_system_provider
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_THROTTLED_FILE_SYSTEM_H_