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

chrome/common/pref_names.h

 // Copyright (c) 2012 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.
 
 // Constants for the names of various preferences, for easier changing.
 
 #ifndef CHROME_COMMON_PREF_NAMES_H_
 #define CHROME_COMMON_PREF_NAMES_H_
 #pragma once
 
@@ skipping 617 matching lines @@
 extern const char kProxy[];
 extern const char kMaxConnectionsPerProxy[];
 
 extern const char kManagedDefaultCookiesSetting[];
 extern const char kManagedDefaultImagesSetting[];
 extern const char kManagedDefaultJavaScriptSetting[];
 extern const char kManagedDefaultPluginsSetting[];
 extern const char kManagedDefaultPopupsSetting[];
 extern const char kManagedDefaultGeolocationSetting[];
 extern const char kManagedDefaultNotificationsSetting[];
+extern const char kManagedDefaultMediaStreamSetting[];
 
 extern const char kManagedCookiesAllowedForUrls[];
 extern const char kManagedCookiesBlockedForUrls[];
 extern const char kManagedCookiesSessionOnlyForUrls[];
 extern const char kManagedImagesAllowedForUrls[];
 extern const char kManagedImagesBlockedForUrls[];
 extern const char kManagedJavaScriptAllowedForUrls[];
 extern const char kManagedJavaScriptBlockedForUrls[];
 extern const char kManagedPluginsAllowedForUrls[];
 extern const char kManagedPluginsBlockedForUrls[];
@@ skipping 78 matching lines @@
 #endif
 
 extern const char kInManagedMode[];
 
 extern const char kNetworkProfileWarningsLeft[];
 extern const char kNetworkProfileLastWarningTime[];
 
 }  // namespace prefs
 
 #endif  // CHROME_COMMON_PREF_NAMES_H_