Roll 50: Copied IDLs, PYTHON scripts from WebKit removed deleted files in WebCore

core/testing/DictionaryTest.idl

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 [
     GarbageCollected
 ] interface DictionaryTest {
     void set(optional InternalDictionary testingDictionary);
     InternalDictionary get();
+    [CallWith=ScriptState] object getDictionaryMemberProperties();
 
     void setDerived(InternalDictionaryDerived derived);
     InternalDictionaryDerived getDerived();
+
+    [CallWith=ExecutionContext, RaisesException] DOMString stringFromIterable(Dictionary iterableDictionary);
 };