Move Declarative Web Request API out of experimental and make it a feature

chrome/common/extensions/extension_permission_set.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.
 
 #ifndef CHROME_COMMON_EXTENSIONS_EXTENSION_PERMISSION_SET_H_
 #define CHROME_COMMON_EXTENSIONS_EXTENSION_PERMISSION_SET_H_
 #pragma once
 
 #include <map>
 #include <set>
@@ skipping 90 matching lines @@
     kBookmark,
     kBrowsingData,
     kChromeAuthPrivate,
     kChromeosInfoPrivate,
     kClipboardRead,
     kClipboardWrite,
     kContentSettings,
     kContextMenus,
     kCookie,
     kDebugger,
+    kDeclarative,
+    kDeclarativeWebRequest,
     kDevtools,
     kExperimental,
     kFileBrowserHandler,
     kFileBrowserPrivate,
     kGeolocation,
     kHistory,
     kIdle,
     kInput,
     kInputMethodPrivate,
     kKeybinding,
@@ skipping 324 matching lines @@
 
   // The list of hosts this effectively grants access to.
   URLPatternSet effective_hosts_;
 
   // A set of oauth2 scopes that are used by the identity API to create OAuth2
   // tokens for accessing the Google Account of the signed-in sync account.
   ExtensionOAuth2Scopes scopes_;
 };
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_PERMISSION_SET_H_