IDL: Add build target for IDL dictionary impl generation in core

Source/core/testing/Internals.h

Index: Source/core/testing/Internals.h
diff --git a/Source/core/testing/Internals.h b/Source/core/testing/Internals.h
index 13fc1cdd4546c3c0498e4393372b4297edb3a42c..6b6aa28b0c62f868566ec91afd69a9216eb0e795 100644
--- a/Source/core/testing/Internals.h
+++ b/Source/core/testing/Internals.h
@@ -48,6 +48,7 @@ class ClientRectList;
 class WebKitPoint;
 class DOMStringList;
 class LocalDOMWindow;
+class DictionaryTest;
 class Document;
 class DocumentMarker;
 class Element;
@@ -261,6 +262,7 @@ public:
     PassRefPtrWillBeRawPtr<MallocStatistics> mallocStatistics() const;
     PassRefPtrWillBeRawPtr<TypeConversions> typeConversions() const;
     PrivateScriptTest* privateScriptTest() const;
+    DictionaryTest* dictionaryTest() const;
 
     Vector<String> getReferencedFilePaths() const;