Create thread-safe RendererExtensionRegistry from ExtensionSet

chrome/renderer/extensions/resource_request_policy.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/renderer/extensions/resource_request_policy.h"
 
 #include "base/logging.h"
 #include "base/strings/stringprintf.h"
 #include "chrome/common/extensions/chrome_manifest_url_handlers.h"
 #include "chrome/common/url_constants.h"
 #include "extensions/common/constants.h"
 #include "extensions/common/extension.h"
-#include "extensions/common/extension_set.h"
 #include "extensions/common/manifest_handlers/icons_handler.h"
 #include "extensions/common/manifest_handlers/web_accessible_resources_info.h"
+#include "extensions/renderer/renderer_extension_registry.h"
 #include "third_party/WebKit/public/platform/WebString.h"
 #include "third_party/WebKit/public/web/WebConsoleMessage.h"
 #include "third_party/WebKit/public/web/WebDocument.h"
 #include "third_party/WebKit/public/web/WebFrame.h"
 #include "ui/base/page_transition_types.h"
 #include "url/gurl.h"
 
 namespace extensions {
 
 // This method does a security check whether chrome-extension:// URLs can be
 // requested by the renderer. Since this is in an untrusted process, the browser
 // has a similar check to enforce the policy, in case this process is exploited.
 // If you are changing this function, ensure equivalent checks are added to
 // extension_protocols.cc's AllowExtensionResourceLoad.
 
 // static
 bool ResourceRequestPolicy::CanRequestResource(
     const GURL& resource_url,
     blink::WebFrame* frame,
-    ui::PageTransition transition_type,
-    const ExtensionSet* loaded_extensions) {
+    ui::PageTransition transition_type) {
   CHECK(resource_url.SchemeIs(extensions::kExtensionScheme));
 
   const Extension* extension =
-      loaded_extensions->GetExtensionOrAppByURL(resource_url);
+      RendererExtensionRegistry::Get()->GetExtensionOrAppByURL(resource_url);
   if (!extension) {
     // Allow the load in the case of a non-existent extension. We'll just get a
     // 404 from the browser process.
     return true;
   }
 
   // Disallow loading of packaged resources for hosted apps. We don't allow
   // hybrid hosted/packaged apps. The one exception is access to icons, since
   // some extensions want to be able to do things like create their own
   // launchers.
@@ skipping 73 matching lines @@
     return false;
   }
 
   return true;
 }
 
 ResourceRequestPolicy::ResourceRequestPolicy() {
 }
 
 }  // namespace extensions