Add database recovery for FileSystemOriginDatabase

webkit/fileapi/file_system_directory_database_unittest.cc

 // Copyright (c) 2011 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/file_system_directory_database.h"
 
 #include <math.h>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/scoped_temp_dir.h"
@@ skipping 11 matching lines @@
   FileSystemDirectoryDatabaseTest() {
     EXPECT_TRUE(base_.CreateUniqueTempDir());
     InitDatabase();
   }
 
   FileSystemDirectoryDatabase* db() {
     return db_.get();
   }
 
   void InitDatabase() {
+    // First reset() is to avoid multiple database instance for single
+    // directory at once.
     db_.reset();
-    FilePath path = base_.path().AppendASCII("db");
-    db_.reset(new FileSystemDirectoryDatabase(path));
+    db_.reset(new FileSystemDirectoryDatabase(base_.path()));
   }
 
   bool AddFileInfo(FileId parent_id, const FilePath::StringType& name) {
     FileId file_id;
     FileInfo info;
     info.parent_id = parent_id;
     info.name = name;
     return db_->AddFileInfo(info, &file_id);
   }
 
@@ skipping 366 matching lines @@
   EXPECT_TRUE(db()->GetNextInteger(&next));
   EXPECT_EQ(2, next);
   EXPECT_TRUE(db()->GetNextInteger(&next));
   EXPECT_EQ(3, next);
   InitDatabase();
   EXPECT_TRUE(db()->GetNextInteger(&next));
   EXPECT_EQ(4, next);
 }
 
 }  // namespace fileapi