Store USB device permissions in website settings.

chrome/browser/permissions/chooser_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_context.h"
+
+#include "base/logging.h"
+#include "chrome/browser/permissions/chooser_type.h"
+
+#if !defined(OS_ANDROID)
+#include "chrome/browser/usb/usb_chooser_context.h"
+#include "chrome/browser/usb/usb_chooser_context_factory.h"
+#endif
+
+// static
+ChooserContextBase* ChooserContext::Get(Profile* profile,
+                                        ChooserType chooser_type) {
+  // NOTE: the factories used in this method have to stay in sync with
+  // ::GetFactories() below.
+  switch (chooser_type) {
+#if !defined(OS_ANDROID)
+    case ChooserType::USB:
+      return UsbChooserContextFactory::GetForProfile(profile);
+#endif
+    default:
+      NOTREACHED() << "No ChooserContext associated with "
+                   << static_cast<int>(chooser_type);
+      break;
+  }
+
+  return nullptr;
+}
+
+// static
+const std::list<KeyedServiceBaseFactory*>& ChooserContext::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()) {
+#if !defined(OS_ANDROID)
+    factories.push_back(UsbChooserContextFactory::GetInstance());
+#endif
+  }
+
+  return factories;
+}