Revert of Make DOMWrapperWorld::current() return a reference instead of a pointer

Source/bindings/tests/idls/TestInterfacePython2.idl

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 11 matching lines @@
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 // This is for interface extended attributes that interact with another extended
-// attribute, and thus both cannot be tested at once; and for special
-// operations, which need a separate interface to test on.
+// attribute, and thus both cannot be tested at once.
 // The more *minor* extended attribute should be put in this file.
 
 [
-    Custom=VisitDOMWrapper, // Conflict with [SetWrapperReferenceTo] and [SetWrapperReferenceFrom]
-] interface TestInterface3 {
-    [Custom] getter boolean (unsigned long index);
-    [Custom] setter boolean (unsigned long index, Node value);
-    [Custom] deleter boolean (unsigned long index);
-
-    [Custom=PropertyGetter|PropertyEnumerator|PropertyQuery] getter Node (DOMString name);
-    [Custom] setter Node (DOMString name, Node value);
-    [Custom] deleter boolean (DOMString name);
+    Constructor,  // Test interaction with [Custom=Wrap]
+    Custom=Wrap,  // Conflicts with and [Custom=ToV8], respectively
+    DependentLifetime,  // Covered by [ActiveDOMObject]
+    SetWrapperReferenceFrom=ownerNode,  // Conflicts with [SetWrapperReferenceTo]
+    SpecialWrapFor=Interface1|Interface2,  // Conflicts with [Custom=ToV8]
+] interface TestInterfacePython2 {
 };