Refactoring: de-couple Extensions from "script injection System" [render side] : 1

extensions/renderer/user_script_set.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/user_script_set.h"
 
+#include "base/memory/ref_counted.h"
 #include "content/public/common/url_constants.h"
 #include "content/public/renderer/render_thread.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/extension_set.h"
 #include "extensions/common/permissions/permissions_data.h"
+#include "extensions/renderer/extension_injection_host.h"
 #include "extensions/renderer/extensions_renderer_client.h"
 #include "extensions/renderer/script_context.h"
 #include "extensions/renderer/script_injection.h"
 #include "extensions/renderer/user_script_injector.h"
 #include "third_party/WebKit/public/web/WebDocument.h"
 #include "third_party/WebKit/public/web/WebFrame.h"
 #include "url/gurl.h"
 
 namespace extensions {
 
@@ skipping 165 matching lines @@
 
   GURL effective_document_url = ScriptContext::GetEffectiveDocumentURL(
       web_frame, document_url, script->match_about_blank());
 
   if (!script->MatchesURL(effective_document_url))
     return injection.Pass();
 
   scoped_ptr<ScriptInjector> injector(new UserScriptInjector(script,
                                                              this,
                                                              is_declarative));
+  HostID host_id(HostID::EXTENSIONS, extension->id());
+  ExtensionInjectionHost extension_injection_host(
+      make_scoped_refptr<const Extension>(extension));
   if (injector->CanExecuteOnFrame(
-          extension,
+          &extension_injection_host,
           web_frame,
           -1,  // Content scripts are not tab-specific.
           web_frame->top()->document().url()) ==
       PermissionsData::ACCESS_DENIED) {
     return injection.Pass();
   }
 
   bool inject_css = !script->css_scripts().empty() &&
                     run_location == UserScript::DOCUMENT_START;
   bool inject_js =
       !script->js_scripts().empty() && script->run_location() == run_location;
   if (inject_css || inject_js) {
     injection.reset(new ScriptInjection(
         injector.Pass(),
         web_frame->toWebLocalFrame(),
-        extension->id(),
+        host_id,
         run_location,
         tab_id));
   }
   return injection.Pass();
 }
 
 }  // namespace extensions