diff -r 000000000000 -r 6474c204b198 dom/indexedDB/IDBFileHandle.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/indexedDB/IDBFileHandle.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,125 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "IDBFileHandle.h"
+
+#include "mozilla/dom/file/File.h"
+#include "mozilla/dom/IDBFileHandleBinding.h"
+#include "mozilla/dom/quota/FileStreams.h"
+
+#include "IDBDatabase.h"
+
+USING_INDEXEDDB_NAMESPACE
+USING_QUOTA_NAMESPACE
+
+namespace {
+
+inline
+already_AddRefed<nsIFile>
+GetFileFor(FileInfo* aFileInfo)
+
+{
+  FileManager* fileManager = aFileInfo->Manager();
+  nsCOMPtr<nsIFile> directory = fileManager->GetDirectory();
+  NS_ENSURE_TRUE(directory, nullptr);
+
+  nsCOMPtr<nsIFile> file = fileManager->GetFileForId(directory,
+                                                     aFileInfo->Id());
+  NS_ENSURE_TRUE(file, nullptr);
+
+  return file.forget();
+}
+
+} // anonymous namespace
+
+IDBFileHandle::IDBFileHandle(IDBDatabase* aOwner)
+  : FileHandle(aOwner)
+{
+}
+
+// static
+already_AddRefed<IDBFileHandle>
+IDBFileHandle::Create(IDBDatabase* aDatabase,
+                      const nsAString& aName,
+                      const nsAString& aType,
+                      already_AddRefed<FileInfo> aFileInfo)
+{
+  NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
+
+  nsRefPtr<FileInfo> fileInfo(aFileInfo);
+  NS_ASSERTION(fileInfo, "Null pointer!");
+
+  nsRefPtr<IDBFileHandle> newFile = new IDBFileHandle(aDatabase);
+
+  newFile->mFileStorage = aDatabase;
+  newFile->mName = aName;
+  newFile->mType = aType;
+
+  newFile->mFile = GetFileFor(fileInfo);
+  NS_ENSURE_TRUE(newFile->mFile, nullptr);
+  newFile->mFileName.AppendInt(fileInfo->Id());
+
+  fileInfo.swap(newFile->mFileInfo);
+
+  return newFile.forget();
+}
+
+already_AddRefed<nsISupports>
+IDBFileHandle::CreateStream(nsIFile* aFile, bool aReadOnly)
+{
+  nsCOMPtr<nsIOfflineStorage> storage = do_QueryInterface(mFileStorage);
+  NS_ASSERTION(storage, "This should always succeed!");
+
+  PersistenceType persistenceType = storage->Type();
+  const nsACString& group = storage->Group();
+  const nsACString& origin = storage->Origin();
+
+  nsCOMPtr<nsISupports> result;
+
+  if (aReadOnly) {
+    nsRefPtr<FileInputStream> stream =
+      FileInputStream::Create(persistenceType, group, origin, aFile, -1, -1,
+                              nsIFileInputStream::DEFER_OPEN);
+    result = NS_ISUPPORTS_CAST(nsIFileInputStream*, stream);
+  }
+  else {
+    nsRefPtr<FileStream> stream =
+      FileStream::Create(persistenceType, group, origin, aFile, -1, -1,
+                         nsIFileStream::DEFER_OPEN);
+    result = NS_ISUPPORTS_CAST(nsIFileStream*, stream);
+  }
+  NS_ENSURE_TRUE(result, nullptr);
+
+  return result.forget();
+}
+
+already_AddRefed<nsIDOMFile>
+IDBFileHandle::CreateFileObject(mozilla::dom::file::LockedFile* aLockedFile,
+                                uint32_t aFileSize)
+{
+  nsCOMPtr<nsIDOMFile> file = new mozilla::dom::file::File(
+    mName, mType, aFileSize, mFile, aLockedFile, mFileInfo);
+
+  return file.forget();
+}
+
+// virtual
+JSObject*
+IDBFileHandle::WrapObject(JSContext* aCx)
+{
+  return IDBFileHandleBinding::Wrap(aCx, this);
+}
+
+IDBDatabase*
+IDBFileHandle::Database()
+{
+  NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
+
+  IDBDatabase* database = static_cast<IDBDatabase*>(mFileStorage.get());
+  MOZ_ASSERT(database);
+
+  return database;
+}