Clear in-memory caches of renderers when rules change

chrome/browser/extensions/api/declarative_webrequest/webrequest_rules_registry.cc

 // 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.
 
 #include "chrome/browser/extensions/api/declarative_webrequest/webrequest_rules_registry.h"
 
 #include <limits>
 
 #include "chrome/browser/extensions/api/declarative_webrequest/webrequest_condition.h"
 #include "chrome/browser/extensions/api/web_request/web_request_api_helpers.h"
@@ skipping 147 matching lines @@
   }
 
   // Register url patterns in url_matcher_.
   URLMatcherConditionSet::Vector all_new_condition_sets;
   for (RulesMap::iterator i = new_webrequest_rules.begin();
        i != new_webrequest_rules.end(); ++i) {
     i->second->conditions().GetURLMatcherConditionSets(&all_new_condition_sets);
   }
   url_matcher_.AddConditionSets(all_new_condition_sets);
 
+  ClearCacheOnNavigation();
+
   return "";
 }
 
 std::string WebRequestRulesRegistry::RemoveRulesImpl(
     const std::string& extension_id,
     const std::vector<std::string>& rule_identifiers) {
   // URLMatcherConditionSet IDs that can be removed from URLMatcher.
   std::vector<URLMatcherConditionSet::ID> remove_from_url_matcher;
 
   for (std::vector<std::string>::const_iterator i = rule_identifiers.begin();
@@ skipping 15 matching lines @@
       rule_triggers_.erase((*j)->id());
     }
 
     // Remove reference to actual rule.
     webrequest_rules_.erase(webrequest_rules_entry);
   }
 
   // Clear URLMatcher based on condition_set_ids that are not needed any more.
   url_matcher_.RemoveConditionSets(remove_from_url_matcher);
 
+  ClearCacheOnNavigation();
+
   return "";
 }
 
 std::string WebRequestRulesRegistry::RemoveAllRulesImpl(
     const std::string& extension_id) {
   // Search all identifiers of rules that belong to extension |extension_id|.
   std::vector<std::string> rule_identifiers;
   for (RulesMap::iterator i = webrequest_rules_.begin();
        i != webrequest_rules_.end(); ++i) {
     const WebRequestRule::GlobalRuleId& global_rule_id = i->first;
     if (global_rule_id.first == extension_id)
       rule_identifiers.push_back(global_rule_id.second);
   }
 
+  // No need to call ClearCacheOnNavigation() here because RemoveRulesImpl
+  // takes care of that.
   return RemoveRulesImpl(extension_id, rule_identifiers);
 }
 
 content::BrowserThread::ID WebRequestRulesRegistry::GetOwnerThread() const {
   return content::BrowserThread::IO;
 }
 
 bool WebRequestRulesRegistry::IsEmpty() const {
   return rule_triggers_.empty() && webrequest_rules_.empty() &&
       url_matcher_.IsEmpty();
 }
 
 WebRequestRulesRegistry::~WebRequestRulesRegistry() {}
 
 base::Time WebRequestRulesRegistry::GetExtensionInstallationTime(
     const std::string& extension_id) const {
   if (!extension_info_map_.get())  // May be NULL during testing.
     return base::Time();
 
   return extension_info_map_->GetInstallTime(extension_id);
 }
 
+void WebRequestRulesRegistry::ClearCacheOnNavigation() {
+  extension_web_request_api_helpers::ClearCacheOnNavigation();
+}
+
 }  // namespace extensions