Make isolated file system works for a device root (e.g. X:\\)

webkit/fileapi/isolated_mount_point_provider.cc

 // 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.
 
 #include "webkit/fileapi/isolated_mount_point_provider.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/file_path.h"
@@ skipping 51 matching lines @@
 }
 
 FilePath IsolatedMountPointProvider::GetFileSystemRootPathOnFileThread(
     const GURL& origin_url,
     FileSystemType type,
     const FilePath& virtual_path,
     bool create) {
   if (create || type != kFileSystemTypeIsolated)
     return FilePath();
   std::string fsid;
-  FilePath root, path;
+  FilePath path;
+  IsolatedContext::FileInfo root;
   if (!isolated_context()->CrackIsolatedPath(virtual_path, &fsid, &root, &path))
     return FilePath();
-  return root;
+  return root.path;
 }
 
 bool IsolatedMountPointProvider::IsAccessAllowed(
     const GURL& origin_url, FileSystemType type, const FilePath& virtual_path) {
   if (type != fileapi::kFileSystemTypeIsolated)
     return false;
 
   std::string filesystem_id;
-  FilePath root, path;
+  FilePath path;
   return isolated_context()->CrackIsolatedPath(
-      virtual_path, &filesystem_id, &root, &path);
+      virtual_path, &filesystem_id, NULL, &path);
 }
 
 bool IsolatedMountPointProvider::IsRestrictedFileName(
     const FilePath& filename) const {
   return false;
 }
 
 FileSystemFileUtil* IsolatedMountPointProvider::GetFileUtil() {
   return isolated_file_util_.get();
 }
 
 FilePath IsolatedMountPointProvider::GetPathForPermissionsCheck(
     const FilePath& virtual_path) const {
   std::string fsid;
-  FilePath root, path;
-  if (!isolated_context()->CrackIsolatedPath(virtual_path, &fsid, &root, &path))
+  FilePath path;
+  if (!isolated_context()->CrackIsolatedPath(virtual_path, &fsid, NULL, &path))
     return FilePath();
   return path;
 }
 
 FileSystemOperationInterface*
 IsolatedMountPointProvider::CreateFileSystemOperation(
     const FileSystemURL& url,
     FileSystemContext* context) const {
   return new FileSystemOperation(context);
 }
@@ skipping 15 matching lines @@
   FilePath path = GetPathFromURL(url);
   return path.empty() ? NULL : new LocalFileStreamWriter(path, offset);
 }
 
 FileSystemQuotaUtil* IsolatedMountPointProvider::GetQuotaUtil() {
   // No quota support.
   return NULL;
 }
 
 }  // namespace fileapi