GN: Always check for bad items.

tools/gn/target.cc

Index: tools/gn/target.cc
diff --git a/tools/gn/target.cc b/tools/gn/target.cc
index aafdc4fedce82579452e522357e17519127e483e..49de35df03ea09d117b31716175b80035a89d83f 100644
--- a/tools/gn/target.cc
+++ b/tools/gn/target.cc
@@ -300,15 +300,13 @@ bool Target::OnResolved(Err* err) {
 
   FillOutputFiles();
 
-  if (settings()->build_settings()->check_for_bad_items()) {
-    if (!CheckVisibility(err))
-      return false;
-    if (!CheckTestonly(err))
-      return false;
-    if (!CheckAssertNoDeps(err))
-      return false;
-    CheckSourcesGenerated();
-  }
+  if (!CheckVisibility(err))
+    return false;
+  if (!CheckTestonly(err))
+    return false;
+  if (!CheckAssertNoDeps(err))
+    return false;
+  CheckSourcesGenerated();
 
   if (!write_runtime_deps_output_.value().empty())
     g_scheduler->AddWriteRuntimeDepsTarget(this);