refactor to Introduce AUDIO_CAPTURE and VIDEO_CAPTURE permissions.

chrome/browser/permissions/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/permission_context.h"
 
 #include "chrome/browser/geolocation/geolocation_permission_context.h"
 #include "chrome/browser/geolocation/geolocation_permission_context_factory.h"
+#include "chrome/browser/media/media_stream_camera_permission_context_factory.h"
+#include "chrome/browser/media/media_stream_device_permission_context.h"
+#include "chrome/browser/media/media_stream_mic_permission_context_factory.h"
 #include "chrome/browser/media/midi_permission_context.h"
 #include "chrome/browser/media/midi_permission_context_factory.h"
 #include "chrome/browser/notifications/notification_permission_context.h"
 #include "chrome/browser/notifications/notification_permission_context_factory.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/push_messaging/push_messaging_permission_context.h"
 #include "chrome/browser/push_messaging/push_messaging_permission_context_factory.h"
 #include "chrome/browser/storage/durable_storage_permission_context.h"
 #include "chrome/browser/storage/durable_storage_permission_context_factory.h"
 #include "content/public/browser/permission_type.h"
@@ skipping 23 matching lines @@
     case PermissionType::PROTECTED_MEDIA_IDENTIFIER:
       return ProtectedMediaIdentifierPermissionContextFactory::GetForProfile(
           profile);
 #endif
     case content::PermissionType::DURABLE_STORAGE:
       return DurableStoragePermissionContextFactory::GetForProfile(profile);
     case PermissionType::MIDI:
       // PermissionType::MIDI is a valid permission but does not have a
       // permission context. It has a constant value instead.
       break;
+    case PermissionType::AUDIO_CAPTURE:
+      return MediaStreamMicPermissionContextFactory::GetForProfile(profile);
+    case PermissionType::VIDEO_CAPTURE:
+      return MediaStreamCameraPermissionContextFactory::GetForProfile(profile);
     default:
       NOTREACHED() << "No PermissionContext associated with "
                    << static_cast<int>(permission_type);
       break;
   }
 
   return nullptr;
 }
 
 // static
 const std::list<KeyedServiceBaseFactory*>& PermissionContext::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(GeolocationPermissionContextFactory::GetInstance());
     factories.push_back(MidiPermissionContextFactory::GetInstance());
     factories.push_back(NotificationPermissionContextFactory::GetInstance());
     factories.push_back(PushMessagingPermissionContextFactory::GetInstance());
 #if defined(OS_ANDROID) || defined(OS_CHROMEOS)
     factories.push_back(
         ProtectedMediaIdentifierPermissionContextFactory::GetInstance());
 #endif
     factories.push_back(DurableStoragePermissionContextFactory::GetInstance());
+    factories.push_back(MediaStreamMicPermissionContextFactory::GetInstance());
+    factories.push_back(
+        MediaStreamCameraPermissionContextFactory::GetInstance());
   }
 
   return factories;
 }