Store USB device permissions in website settings.

chrome/browser/permissions/chooser_type.h

Index: chrome/browser/permissions/chooser_type.h
diff --git a/chrome/browser/permissions/chooser_type.h b/chrome/browser/permissions/chooser_type.h
new file mode 100644
index 0000000000000000000000000000000000000000..354f65f817b5d11f36b4cfc24f08027fb9bb69cc
--- /dev/null
+++ b/chrome/browser/permissions/chooser_type.h
@@ -0,0 +1,12 @@
+// Copyright 2014 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.
+
+#ifndef CHROME_BROWSER_PERMISSIONS_CHOOSER_TYPE_H_
+#define CHROME_BROWSER_PERMISSIONS_CHOOSER_TYPE_H_
+
+enum class ChooserType {
+  USB = 1,
+};
+
+#endif  // CHROME_BROWSER_PERMISSIONS_CHOOSER_TYPE_H_