FileAPI: Factor out getting root URI and FS name parts into each FS backend

webkit/browser/fileapi/file_system_backend.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 WEBKIT_BROWSER_FILEAPI_FILE_SYSTEM_BACKEND_H_
 #define WEBKIT_BROWSER_FILEAPI_FILE_SYSTEM_BACKEND_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 25 matching lines @@
 class RemoteFileSystemProxyInterface;
 
 // An interface for defining a file system backend.
 //
 // NOTE: when you implement a new FileSystemBackend for your own
 // FileSystem module, please contact to kinuko@chromium.org.
 //
 class WEBKIT_STORAGE_BROWSER_EXPORT FileSystemBackend {
  public:
   // Callback for OpenFileSystem.
-  typedef base::Callback<void(base::PlatformFileError error)>
+  typedef base::Callback<void(const GURL& root_url,
+                              const std::string& name,
+                              base::PlatformFileError error)>
       OpenFileSystemCallback;
   virtual ~FileSystemBackend() {}
 
   // Returns true if this mount point provider can handle |type|.
   // One mount point provider may be able to handle multiple filesystem types.
   virtual bool CanHandleType(FileSystemType type) const = 0;
 
   // Initializes the filesystem for the given |origin_url| and |type|.
   // This verifies if it is allowed to request (or create) the filesystem
   // and if it can access (or create) the root directory of the mount point.
@@ skipping 83 matching lines @@
         const std::string& extension_id) = 0;
   // Gets virtual path by known filesystem path. Returns false when filesystem
   // path is not exposed by this provider.
   virtual bool GetVirtualPath(const base::FilePath& file_system_path,
                               base::FilePath* virtual_path) = 0;
 };
 
 }  // namespace fileapi
 
 #endif  // WEBKIT_BROWSER_FILEAPI_FILE_SYSTEM_BACKEND_H_