Support extension precedences in declarative WebRequest API

chrome/browser/extensions/api/declarative_webrequest/webrequest_rules_registry.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_WEBREQUEST_WEBREQUEST_RULES_REGISTRY_H_
 #define CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_WEBREQUEST_WEBREQUEST_RULES_REGISTRY_H_
 #pragma once
 
 #include <list>
 #include <map>
 #include <set>
 #include <vector>
 
+#include "base/time.h"
 #include "base/memory/linked_ptr.h"
+#include "base/memory/ref_counted.h"
 #include "chrome/browser/extensions/api/declarative/rules_registry_with_cache.h"
 #include "chrome/browser/extensions/api/declarative_webrequest/request_stages.h"
 #include "chrome/browser/extensions/api/declarative_webrequest/webrequest_rule.h"
+#include "chrome/browser/extensions/extension_info_map.h"
 #include "chrome/common/extensions/matcher/url_matcher.h"
 
+class Profile;
+
 namespace extension_web_request_api_helpers {
 struct EventResponseDelta;
 }
 
 namespace net {
 class URLRequest;
 }
 
 namespace extensions {
 
@@ skipping 23 matching lines @@
 //
 // For this, the URLRequestCondition has a URLMatcherConditionSet, which
 // represents the {'host_suffix': 'example.com', 'path_prefix': '/query'} part.
 // We will then ask the URLMatcher, whether a given URL
 // "http://www.example.com/query/" has any matches, and the URLMatcher
 // will respond with the URLMatcherConditionSet::ID. We can map this
 // to the WebRequestRule and check whether also the other conditions (in this
 // example 'scheme': 'http') are fulfilled.
 class WebRequestRulesRegistry : public RulesRegistryWithCache {
  public:
-  WebRequestRulesRegistry();
+  explicit WebRequestRulesRegistry(Profile* profile);
 
   // TODO(battre): This will become an implementation detail, because we need
   // a way to also execute the actions of the rules.
   std::set<WebRequestRule::GlobalRuleId> GetMatches(
       net::URLRequest* request,
       RequestStages request_stage);
 
   // Returns which modifications should be executed on the network request
   // according to the rules registered in this registry.
   std::list<LinkedPtrEventResponseDelta> CreateDeltas(
       net::URLRequest* request, RequestStages request_stage);
 
   // Implementation of RulesRegistryWithCache:
   virtual std::string AddRulesImpl(
       const std::string& extension_id,
       const std::vector<linked_ptr<RulesRegistry::Rule> >& rules) OVERRIDE;
   virtual std::string RemoveRulesImpl(
       const std::string& extension_id,
       const std::vector<std::string>& rule_identifiers) OVERRIDE;
   virtual std::string RemoveAllRulesImpl(
       const std::string& extension_id) OVERRIDE;
   virtual content::BrowserThread::ID GetOwnerThread() const OVERRIDE;
 
   // Returns true if this object retains no allocated data. Only for debugging.
   bool IsEmpty() const;
 
+ protected:
+  virtual ~WebRequestRulesRegistry();
+  virtual base::Time GetExtensionInstallationTime(
+      const std::string& extension_id) const;
+
  private:
   typedef std::map<URLMatcherConditionSet::ID, WebRequestRule*> RuleTriggers;
   typedef std::map<WebRequestRule::GlobalRuleId, linked_ptr<WebRequestRule> >
       RulesMap;
 
-  virtual ~WebRequestRulesRegistry();
-
   // Map that tells us which WebRequestRule may match under the condition that
   // the URLMatcherConditionSet::ID was returned by the |url_matcher_|.
   RuleTriggers rule_triggers_;
 
   RulesMap webrequest_rules_;
 
   URLMatcher url_matcher_;
+
+  scoped_refptr<ExtensionInfoMap> extension_info_map_;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_WEBREQUEST_WEBREQUEST_RULES_REGISTRY_H_