[v8 gc] Introduce a base class for all objects that can have pending activity

third_party/WebKit/Source/bindings/core/v8/v8.gypi

 # 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.
 
 {
     'includes': [
         'custom/custom.gypi',
         '../../modules/v8/generated.gypi',
     ],
     'variables': {
@@ skipping 108 matching lines @@
             'V8ErrorHandler.cpp',
             'V8ErrorHandler.h',
             'V8EventListener.cpp',
             'V8EventListener.h',
             'V8EventListenerList.cpp',
             'V8EventListenerList.h',
             'V8GCController.cpp',
             'V8GCController.h',
             'V8GCForContextDispose.cpp',
             'V8GCForContextDispose.h',
+            'V8GCRoot.cpp',
+            'V8GCRoot.h',
             'V8GlobalValueMap.h',
             'V8HiddenValue.cpp',
             'V8HiddenValue.h',
             'V8IdleTaskRunner.h',
             'V8Initializer.cpp',
             'V8Initializer.h',
             'V8IntersectionObserverCallback.cpp',
             'V8IntersectionObserverCallback.h',
             'V8IteratorResultValue.cpp',
             'V8IteratorResultValue.h',
@@ skipping 52 matching lines @@
             'ScriptStreamerTest.cpp',
             'SerializedScriptValueTest.cpp',
             'ToV8Test.cpp',
             'V8BindingForTesting.cpp',
             'V8BindingForTesting.h',
             'V8BindingTest.cpp',
             'V8ScriptRunnerTest.cpp',
         ],
     },
 }