Remove PermissionContext factories

chrome/browser/media/media_stream_mic_permission_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/media/media_stream_mic_permission_context_factory.h"
-
-#include "chrome/browser/media/media_stream_device_permission_context.h"
-#include "chrome/browser/profiles/incognito_helpers.h"
-#include "chrome/browser/profiles/profile.h"
-#include "components/keyed_service/content/browser_context_dependency_manager.h"
-#include "content/public/browser/permission_type.h"
-
-MediaStreamMicPermissionContextFactory::MediaStreamMicPermissionContextFactory()
-    : PermissionContextFactoryBase(
-          "MediaStreamMicPermissionContext",
-          BrowserContextDependencyManager::GetInstance()) {}
-
-MediaStreamMicPermissionContextFactory::
-    ~MediaStreamMicPermissionContextFactory() {}
-
-KeyedService* MediaStreamMicPermissionContextFactory::BuildServiceInstanceFor(
-    content::BrowserContext* profile) const {
-  return new MediaStreamDevicePermissionContext(
-      static_cast<Profile*>(profile), content::PermissionType::AUDIO_CAPTURE,
-      CONTENT_SETTINGS_TYPE_MEDIASTREAM_MIC);
-}
-
-// static
-MediaStreamMicPermissionContextFactory*
-MediaStreamMicPermissionContextFactory::GetInstance() {
-  return base::Singleton<MediaStreamMicPermissionContextFactory>::get();
-}
-
-// static
-MediaStreamDevicePermissionContext*
-MediaStreamMicPermissionContextFactory::GetForProfile(Profile* profile) {
-  return static_cast<MediaStreamDevicePermissionContext*>(
-      GetInstance()->GetServiceForBrowserContext(profile, true));
-}