FileAPI: Run database recovery on IOError.

webkit/fileapi/file_system_database_test_helper.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/file_system_database_test_helper.h"
 
 #include <algorithm>
 #include <functional>
 #include <vector>
 
@@ skipping 61 matching lines @@
                  std::logical_not<char>());
 
   int written_size = base::WritePlatformFile(file, offset,
                                              vector_as_array(&buf), buf.size());
   EXPECT_GT(written_size, 0);
   EXPECT_EQ(buf.size(), static_cast<size_t>(written_size));
 
   base::ClosePlatformFile(file);
 }
 
+void DeleteDatabaseFile(const base::FilePath& db_path,
+                        leveldb::FileType type) {
+  file_util::FileEnumerator file_enum(db_path, false /* not recursive */,
+      file_util::FileEnumerator::DIRECTORIES |
+      file_util::FileEnumerator::FILES);
+  base::FilePath file_path;
+  base::FilePath picked_file_path;
+  uint64 picked_file_number = kuint64max;
+
+  while (!(file_path = file_enum.Next()).empty()) {
+    uint64 number = kuint64max;
+    leveldb::FileType file_type;
+    EXPECT_TRUE(leveldb::ParseFileName(FilePathToString(file_path.BaseName()),
+                                       &number, &file_type));
+    if (file_type == type &&
+        (picked_file_number == kuint64max || picked_file_number < number)) {
+      picked_file_path = file_path;
+      picked_file_number = number;

[kinuko, 2013/04/10 06:23:49]

Maybe we could just delete all files rather than picking the smallest one?

[tzik, 2013/04/10 06:49:20]

Done.

+    }
+  }
+
+  EXPECT_FALSE(picked_file_path.empty());
+  EXPECT_NE(kuint64max, picked_file_number);
+
+  file_util::Delete(picked_file_path, false);
+}
+
 }  // namespace fileapi