Web MIDI: implement permission infobar

chrome/browser/media/chrome_midi_permission_context_factory.cc

+// Copyright 2013 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/media/chrome_midi_permission_context_factory.h"
+
+#include "chrome/browser/media/chrome_midi_permission_context.h"
+#include "chrome/browser/profiles/incognito_helpers.h"
+#include "chrome/browser/profiles/profile.h"
+#include "components/browser_context_keyed_service/browser_context_dependency_manager.h"
+
+namespace {
+
+class Service : public BrowserContextKeyedService {

[Bernhard Bauer, 2013/07/31 15:35:39]

Instead of doing this, you could directly inherit from
RefcountedBrowserContextKeyedService.

[Takashi Toyoshima, 2013/08/01 15:08:13]

Done.

+ public:
+  explicit Service(Profile* profile) {
+    context_ = new ChromeMIDIPermissionContext(profile);
+  }
+
+  ChromeMIDIPermissionContext* context() {
+    return context_.get();
+  }
+
+  virtual void Shutdown() OVERRIDE {
+    context()->ShutdownOnUIThread();
+  }
+
+ private:
+  scoped_refptr<ChromeMIDIPermissionContext> context_;
+
+  DISALLOW_COPY_AND_ASSIGN(Service);
+};
+
+}  // namespace
+
+// static
+ChromeMIDIPermissionContext*
+ChromeMIDIPermissionContextFactory::GetForProfile(Profile* profile) {
+  return static_cast<Service*>(
+      GetInstance()->GetServiceForBrowserContext(profile, true))->context();
+}
+
+// static
+ChromeMIDIPermissionContextFactory*
+ChromeMIDIPermissionContextFactory::GetInstance() {
+  return Singleton<ChromeMIDIPermissionContextFactory>::get();
+}
+
+ChromeMIDIPermissionContextFactory::
+ChromeMIDIPermissionContextFactory()
+    : BrowserContextKeyedServiceFactory(
+          "ChromeMIDIPermissionContext",
+          BrowserContextDependencyManager::GetInstance()) {
+}
+
+ChromeMIDIPermissionContextFactory::
+~ChromeMIDIPermissionContextFactory() {
+}
+
+BrowserContextKeyedService*
+ChromeMIDIPermissionContextFactory::BuildServiceInstanceFor(
+    content::BrowserContext* profile) const {
+  return new Service(static_cast<Profile*>(profile));
+}
+
+content::BrowserContext*
+ChromeMIDIPermissionContextFactory::GetBrowserContextToUse(
+    content::BrowserContext* context) const {
+  return chrome::GetBrowserContextOwnInstanceInIncognito(context);
+}