Add [TypeChecking=Interface] to Internals and PrivateScriptTest

Source/core/testing/PrivateScriptTest.idl

Index: Source/core/testing/PrivateScriptTest.idl
diff --git a/Source/core/testing/PrivateScriptTest.idl b/Source/core/testing/PrivateScriptTest.idl
index 769aa5f687c69130ed2b38352f12f91d327c0e7f..f2dd041cc7cac6ff675fbb4ea293a207f22b7795 100644
--- a/Source/core/testing/PrivateScriptTest.idl
+++ b/Source/core/testing/PrivateScriptTest.idl
@@ -3,7 +3,8 @@
 // found in the LICENSE file.
 
 [
-    GarbageCollected
+    GarbageCollected,
+    TypeChecking=Interface,
 ] interface PrivateScriptTest {
     [ImplementedInPrivateScript] void doNothing();
     [ImplementedInPrivateScript] short return123();
@@ -28,7 +29,7 @@
     [ImplementedInPrivateScript] attribute short shortAttribute;
     [ImplementedInPrivateScript] attribute DOMString stringAttribute;
     [ImplementedInPrivateScript] attribute Node nodeAttribute;
-    [ImplementedInPrivateScript] attribute Node nodeAttributeThrowsIndexSizeError;
+    [ImplementedInPrivateScript] attribute Node? nodeAttributeThrowsIndexSizeError;

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

Made nullable since null was assigned in the layout test that uses this
interface.

(Without linux_blink_dbg on the CQ, these tests won't be run, I think; the
corresponding private script code is #ifdef NDEBUG.)

     [ImplementedInPrivateScript] void voidMethodThrowsDOMSyntaxError();
     [ImplementedInPrivateScript] void voidMethodThrowsError();
     [ImplementedInPrivateScript] void voidMethodThrowsTypeError();