Have bindings layer assume and insist that all interface types are GCed.

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

 /*
  * Copyright (C) 2007, 2008 Apple Inc. All rights reserved.
  * 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 14 matching lines @@
  * 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.
  */
 
 // Console API
 // https://console.spec.whatwg.org/#console-interface
 
 [
     NoInterfaceObject,
-    GarbageCollected,
 ] interface ConsoleBase {
     [CallWith=(ScriptArguments,ScriptState)] void debug();
     [CallWith=(ScriptArguments,ScriptState)] void error();
     [CallWith=(ScriptArguments,ScriptState)] void info();
     [CallWith=(ScriptArguments,ScriptState)] void log();
     [CallWith=(ScriptArguments,ScriptState)] void warn();
     [CallWith=(ScriptArguments,ScriptState)] void dir();
     [CallWith=(ScriptArguments,ScriptState)] void dirxml();
     [CallWith=(ScriptArguments,ScriptState)] void table();
     [CallWith=(ScriptArguments,ScriptState)] void trace();
     [CallWith=(ScriptArguments,ScriptState), ImplementedAs=assertCondition] void assert([Default=Undefined] optional boolean condition);
     [CallWith=(ScriptArguments,ScriptState)] void count();
     [DeprecateAs=ConsoleMarkTimeline] void markTimeline(optional DOMString title = null);
 
     void profile(optional DOMString title = null);
     void profileEnd(optional DOMString title = null);
 
     void time(optional DOMString title = null);
     [CallWith=ScriptState] void timeEnd(optional DOMString title = null);
     void timeStamp(optional DOMString title = null);
 
     [DeprecateAs=ConsoleTimeline,CallWith=ScriptState] void timeline(optional DOMString title = null);
     [DeprecateAs=ConsoleTimelineEnd,CallWith=ScriptState] void timelineEnd(optional DOMString title = null);
 
     [CallWith=(ScriptArguments,ScriptState)] void group();
     [CallWith=(ScriptArguments,ScriptState)] void groupCollapsed();
     void groupEnd();
     [CallWith=(ScriptArguments,ScriptState)] void clear();
 };