Store USB device permissions in website settings.

chrome/browser/usb/usb_permission_context_factory.h

Index: chrome/browser/usb/usb_permission_context_factory.h
diff --git a/chrome/browser/usb/usb_permission_context_factory.h b/chrome/browser/usb/usb_permission_context_factory.h
new file mode 100644
index 0000000000000000000000000000000000000000..b968ad1b2dcefb829e502923b969178a013ddf6e
--- /dev/null
+++ b/chrome/browser/usb/usb_permission_context_factory.h
@@ -0,0 +1,33 @@
+// Copyright 2015 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_USB_USB_PERMISSION_CONTEXT_FACTORY_H_
+#define CHROME_BROWSER_USB_USB_PERMISSION_CONTEXT_FACTORY_H_
+
+#include "base/memory/singleton.h"
+#include "chrome/browser/permissions/permission_context_factory_base.h"
+#include "components/content_settings/core/common/content_settings_types.h"
+
+class UsbPermissionContext;
+class Profile;
+
+class UsbPermissionContextFactory : public PermissionContextFactoryBase {
+ public:
+  static UsbPermissionContext* GetForProfile(Profile* profile);
+  static UsbPermissionContextFactory* GetInstance();
+
+ private:
+  friend struct base::DefaultSingletonTraits<UsbPermissionContextFactory>;
+
+  UsbPermissionContextFactory();
+  ~UsbPermissionContextFactory() override;
+
+  // BrowserContextKeyedBaseFactory methods:
+  KeyedService* BuildServiceInstanceFor(
+      content::BrowserContext* profile) const override;
+
+  DISALLOW_COPY_AND_ASSIGN(UsbPermissionContextFactory);
+};
+
+#endif  // CHROME_BROWSER_USB_USB_PERMISSION_CONTEXT_FACTORY_H_