Avoid using ContentBrowserClient::IsIllegalOrigin in ResourceDispatcherHost.

chrome/browser/extensions/extension_system_impl.h

Index: chrome/browser/extensions/extension_system_impl.h
diff --git a/chrome/browser/extensions/extension_system_impl.h b/chrome/browser/extensions/extension_system_impl.h
index 5cd96a310ff1c93fcefe1abbea79f166005cdf8e..aa0276130be725492f7c4e07ea5843d15abaf741 100644
--- a/chrome/browser/extensions/extension_system_impl.h
+++ b/chrome/browser/extensions/extension_system_impl.h
@@ -15,6 +15,10 @@
 class Profile;
 class ValueStore;
 
+namespace content {
+class ResourceContext;
+}
+
 namespace extensions {
 
 class ExtensionSystemSharedFactory;
@@ -70,6 +74,20 @@ class ExtensionSystemImpl : public ExtensionSystem {
  private:
   friend class ExtensionSystemSharedFactory;
 
+  // Helper functions to register and unregister extensions. These are invoked
+  // on the IO thread.
+  static void RegisterExtensionHelper(InfoMap* info_map,
+                                      const Extension* extension,
+                                      base::Time install_time,
+                                      bool incognito_enabled,
+                                      bool notifications_disabled,
+                                      const content::ResourceContext* context);
+  static void UnregisterExtensionHelper(
+      InfoMap* info_map,
+      const std::string& extension_id,
+      const UnloadedExtensionInfo::Reason reason,
+      const content::ResourceContext* context);
+
   // Owns the Extension-related systems that have a single instance
   // shared between normal and incognito profiles.
   class Shared : public KeyedService {