Store USB device permissions in website settings.

chrome/browser/usb/usb_chooser_context_factory.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/usb/usb_chooser_context_factory.h"
+
+#include "chrome/browser/content_settings/host_content_settings_map_factory.h"
+#include "chrome/browser/profiles/incognito_helpers.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/usb/usb_chooser_context.h"
+#include "components/keyed_service/content/browser_context_dependency_manager.h"
+
+UsbChooserContextFactory::UsbChooserContextFactory()
+    : BrowserContextKeyedServiceFactory(
+          "UsbChooserContext",
+          BrowserContextDependencyManager::GetInstance()) {
+  DependsOn(HostContentSettingsMapFactory::GetInstance());
+}
+
+UsbChooserContextFactory::~UsbChooserContextFactory() {}
+
+KeyedService* UsbChooserContextFactory::BuildServiceInstanceFor(
+    content::BrowserContext* context) const {
+  return new UsbChooserContext(Profile::FromBrowserContext(context));
+}
+
+// static
+UsbChooserContextFactory* UsbChooserContextFactory::GetInstance() {
+  return base::Singleton<UsbChooserContextFactory>::get();
+}
+
+// static
+UsbChooserContext* UsbChooserContextFactory::GetForProfile(Profile* profile) {
+  return static_cast<UsbChooserContext*>(
+      GetInstance()->GetServiceForBrowserContext(profile, true));
+}
+
+content::BrowserContext* UsbChooserContextFactory::GetBrowserContextToUse(
+    content::BrowserContext* context) const {
+  return chrome::GetBrowserContextOwnInstanceInIncognito(context);
+}