Reland "Encapsulate CSS selector declarative content condition tracking"

chrome/browser/extensions/api/declarative_content/content_action.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_BROWSER_EXTENSIONS_API_DECLARATIVE_CONTENT_CONTENT_ACTION_H_
 #define CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_CONTENT_CONTENT_ACTION_H_
 
 #include <string>
 #include <vector>
 
 #include "base/memory/ref_counted.h"
 #include "extensions/browser/api/declarative/declarative_rule.h"
 #include "extensions/browser/declarative_user_script_master.h"
 #include "extensions/common/user_script.h"
 
 namespace base {
 class Time;
 class Value;
+class DictionaryValue;
 }
 
 namespace content {
 class BrowserContext;
 class WebContents;
 }
 
 namespace extensions {
 class Extension;
 
@@ skipping 127 matching lines @@
   DeclarativeUserScriptMaster* master_;
 
   DISALLOW_COPY_AND_ASSIGN(RequestContentScript);
 };
 
 typedef DeclarativeActionSet<ContentAction> ContentActionSet;
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_CONTENT_CONTENT_ACTION_H_