Add [TypeChecking=Interface] to Internals and PrivateScriptTest

Source/core/testing/Internals.idl

Index: Source/core/testing/Internals.idl
diff --git a/Source/core/testing/Internals.idl b/Source/core/testing/Internals.idl
index 9f7dc181de7797bd8adc5b181bd611e714124983..f5598c6af7921c395a1d73dff20d913d05e11049 100644
--- a/Source/core/testing/Internals.idl
+++ b/Source/core/testing/Internals.idl
@@ -27,7 +27,7 @@
 [
     DoNotCheckConstants,
     GarbageCollected,
-    TypeChecking=Unrestricted,
+    TypeChecking=(Interface,Unrestricted),
 ] interface Internals {
     DOMString address(Node node);
 
@@ -223,7 +223,7 @@
     // |node| should be Document, HTMLIFrameElement, or unspecified.
     // If |node| is an HTMLIFrameElement, it assumes node.contentDocument is
     // specified without security checks. Unspecified means this document.
-    [RaisesException] void updateLayoutIgnorePendingStylesheetsAndRunPostLayoutTasks(optional Node node);
+    [RaisesException] void updateLayoutIgnorePendingStylesheetsAndRunPostLayoutTasks(optional Node? node = null);

[Jens Widell, 2015/02/27 15:49:51]

This is called with an (explicit) undefined argument sometimes. That doesn't
work correctly, i.e. isn't treated same as missing, without a default value.
Hence adding a default value.

Also, made nullable so that the default value is valid.

 
     [RaisesException, TypeChecking=Interface] void forceFullRepaint(Document document);