Store USB device permissions in website settings.

chrome/browser/permissions/chooser_permission_context.cc

+// 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.
+
+#include "chrome/browser/permissions/chooser_permission_context.h"
+
+#include "chrome/browser/usb/usb_chooser_permission_context.h"
+#include "chrome/browser/usb/usb_chooser_permission_context_factory.h"
+#include "content/public/browser/permission_type.h"
+
+using content::PermissionType;
+
+// static
+ChooserPermissionContextBase* ChooserPermissionContext::Get(
+    Profile* profile,
+    PermissionType permission_type) {
+  // NOTE: the factories used in this method have to stay in sync with
+  // ::GetFactories() below.
+  switch (permission_type) {
+    case PermissionType::USB:
+      return UsbChooserPermissionContextFactory::GetForProfile(profile);
+    default:
+      NOTREACHED() << "No ChooserPermissionContext associated with "
+                   << static_cast<int>(permission_type);
+      break;
+  }
+
+  return nullptr;
+}
+
+// static
+const std::list<KeyedServiceBaseFactory*>&
+ChooserPermissionContext::GetFactories() {
+  // NOTE: this list has to stay in sync with the factories used by ::Get().
+  CR_DEFINE_STATIC_LOCAL(std::list<KeyedServiceBaseFactory*>, factories, ());
+
+  if (factories.empty()) {
+    factories.push_back(UsbChooserPermissionContextFactory::GetInstance());
+  }
+
+  return factories;
+}