v8binding: Makes Location's wrapper objects alive, really.

third_party/WebKit/Source/core/frame/Location.idl

 /*
  * Copyright (C) 2008 Apple 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 12 matching lines @@
  * 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.
  */
 
 // https://html.spec.whatwg.org/multipage/browsers.html#location
 
 [
     CheckSecurity=Receiver,
+    DependentLifetime,
     Unforgeable,
 ] interface Location {
     // |assign| is *NOT* cross-origin accessible in the spec, but it needs
     // the Incumbent realm when navigating the page.  See the below link.
     // https://html.spec.whatwg.org/multipage/browsers.html#location-object-navigate
     // Unfortunately, Blink does not support the Incumbent realm so far, and
     // we need a hack of assignOriginSafeMethodGetter to simulate the Incumbent
     // realm.  Thus, we have [CrossOrigin] here just for the hack although
     // |assign| itself is not cross-origin accessible.
     // TODO(yukishiino): Remove [CrossOrigin] once we support the Incumbent
@@ skipping 24 matching lines @@
     [SetterCallWith=(CurrentWindow,EnteredWindow), RaisesException=Setter] attribute DOMString hostname;
     [SetterCallWith=(CurrentWindow,EnteredWindow), RaisesException=Setter] attribute DOMString port;
     [SetterCallWith=(CurrentWindow,EnteredWindow), RaisesException=Setter] attribute DOMString pathname;
     [SetterCallWith=(CurrentWindow,EnteredWindow), RaisesException=Setter] attribute DOMString search;
     [SetterCallWith=(CurrentWindow,EnteredWindow), RaisesException=Setter] attribute DOMString hash;
 
     // TODO(foolip): Location does not have a valueOf() override in the spec.
     // See the comment in Location.h for the purpose of this.
     [NotEnumerable, CallWith=ThisValue] any valueOf();
 };