Extract external file systems handling from isolated context.

webkit/fileapi/mount_points.cc

Index: webkit/fileapi/mount_points.cc
diff --git a/webkit/fileapi/mount_points.cc b/webkit/fileapi/mount_points.cc
new file mode 100644
index 0000000000000000000000000000000000000000..d754b25b6182e02433afb0d98a09732986da0eb5
--- /dev/null
+++ b/webkit/fileapi/mount_points.cc
@@ -0,0 +1,15 @@
+// Copyright (c) 2013 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/mount_points.h"
+
+namespace fileapi {
+
+MountPoints::MountPointInfo::MountPointInfo() {}
+MountPoints::MountPointInfo::MountPointInfo(
+    const std::string& name, const FilePath& path)
+    : name(name), path(path) {}
+
+}  // namespace fileapi
+