Refactoring: de-couple Extensions from "script injection System" [render side]:4

extensions/renderer/script_injection_manager.cc

 // Copyright 2014 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 "extensions/renderer/script_injection_manager.h"
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/memory/weak_ptr.h"
 #include "base/values.h"
@@ skipping 248 matching lines @@
     ScriptInjection* injection) {
   ScopedVector<ScriptInjection>::iterator iter =
       std::find(running_injections_.begin(),
                 running_injections_.end(),
                 injection);
   if (iter != running_injections_.end())
     running_injections_.erase(iter);
 }
 
 void ScriptInjectionManager::OnUserScriptsUpdated(
-    const std::set<std::string>& changed_extensions,
+    const std::set<HostID>& changed_hosts,
     const std::vector<UserScript*>& scripts) {
   for (ScopedVector<ScriptInjection>::iterator iter =
            pending_injections_.begin();
        iter != pending_injections_.end();) {
-    if (changed_extensions.count((*iter)->host_id().id()) > 0)
+    if (changed_hosts.count((*iter)->host_id()) > 0)
       iter = pending_injections_.erase(iter);
     else
       ++iter;
   }
 }
 
 void ScriptInjectionManager::RemoveObserver(RVOHelper* helper) {
   for (ScopedVector<RVOHelper>::iterator iter = rvo_helpers_.begin();
        iter != rvo_helpers_.end();
        ++iter) {
@@ skipping 198 matching lines @@
 
   ScriptsRunInfo scripts_run_info;
   ScriptInjection::InjectionResult res = injection->OnPermissionGranted(
       &scripts_run_info);
   if (res == ScriptInjection::INJECTION_BLOCKED)
     running_injections_.push_back(injection.Pass());
   scripts_run_info.LogRun(injection->web_frame(), UserScript::RUN_DEFERRED);
 }
 
 }  // namespace extensions