Introduce HostID and de-couple Extensions from "script injection System" [browser side]

chrome/browser/extensions/api/declarative_content/chrome_content_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_content/chrome_content_rules_registry.h"
 
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/api/declarative_content/content_action.h"
 #include "chrome/browser/extensions/api/declarative_content/content_condition.h"
 #include "chrome/browser/extensions/api/declarative_content/content_constants.h"
@@ skipping 150 matching lines @@
 
   for (std::vector<linked_ptr<RulesRegistry::Rule> >::const_iterator rule =
            rules.begin();
        rule != rules.end();
        ++rule) {
     ContentRule::GlobalRuleId rule_id(extension_id, *(*rule)->id);
     DCHECK(content_rules_.find(rule_id) == content_rules_.end());
 
     scoped_ptr<ContentRule> content_rule(
         ContentRule::Create(url_matcher_.condition_factory(), browser_context(),
+                            HostID(HostID::EXTENSIONS, extension->id()),
                             extension, extension_installation_time, *rule,
                             ContentRule::ConsistencyChecker(), &error));
     if (!error.empty()) {
       // Clean up temporary condition sets created during rule creation.
       url_matcher_.ClearUnusedConditionSets();
       return error;
     }
     DCHECK(content_rule);
 
     new_content_rules[rule_id] = make_linked_ptr(content_rule.release());
@@ skipping 152 matching lines @@
 
 base::Time ChromeContentRulesRegistry::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);
 }
 
 }  // namespace extensions