add "always allow" option to the mediastream infobar and allow user to allow/not allow acces to devi

chrome/browser/content_settings/host_content_settings_map.cc

Index: chrome/browser/content_settings/host_content_settings_map.cc
diff --git a/chrome/browser/content_settings/host_content_settings_map.cc b/chrome/browser/content_settings/host_content_settings_map.cc
index 49f7700e7f74bcde4d8608c7f0029d24782cfe00..6c56dbdbaa18e1189abb0f4fbe10639f31bbd234 100644
--- a/chrome/browser/content_settings/host_content_settings_map.cc
+++ b/chrome/browser/content_settings/host_content_settings_map.cc
@@ -381,6 +381,7 @@ bool HostContentSettingsMap::IsSettingAllowedForType(
     case CONTENT_SETTINGS_TYPE_NOTIFICATIONS:
     case CONTENT_SETTINGS_TYPE_INTENTS:
     case CONTENT_SETTINGS_TYPE_MOUSELOCK:
+    case CONTENT_SETTINGS_TYPE_MEDIASTREAM:
       return setting == CONTENT_SETTING_ASK;
     default:
       return false;