Cleanup: Remove most enable_extensions logic in chrome/ extensions code.

chrome/renderer/extensions/renderer_permissions_policy_delegate.cc

Index: chrome/renderer/extensions/renderer_permissions_policy_delegate.cc
diff --git a/chrome/renderer/extensions/renderer_permissions_policy_delegate.cc b/chrome/renderer/extensions/renderer_permissions_policy_delegate.cc
index 0e1999ddf51bc74c91b1f8ed232ae5be0104fa1c..5e046cd989bef634a28405300f515f055c12b52b 100644
--- a/chrome/renderer/extensions/renderer_permissions_policy_delegate.cc
+++ b/chrome/renderer/extensions/renderer_permissions_policy_delegate.cc
@@ -39,22 +39,18 @@ bool RendererPermissionsPolicyDelegate::CanExecuteScriptOnPage(
     return true;
   }
 
-  CommandLine* command_line = CommandLine::ForCurrentProcess();
+  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   if (command_line->HasSwitch(::switches::kSigninProcess)) {
     if (error)
       *error = errors::kCannotScriptSigninPage;
     return false;
   }
 
-// TODO(thestig): Remove scaffolding once this file no longer builds with
-// extensions disabled.
-#if defined(ENABLE_EXTENSIONS)
-  if (dispatcher_->IsExtensionActive(extensions::kWebStoreAppId)) {
+  if (dispatcher_->IsExtensionActive(kWebStoreAppId)) {
     if (error)
       *error = errors::kCannotScriptGallery;
     return false;
   }
-#endif
 
   return true;
 }