Bring back ScriptDebugServer and associated machinery

sky/engine/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',
     ],
     'variables': {
         'bindings_core_v8_dir': '.',
@@ skipping 43 matching lines @@
             'ScriptGCEvent.cpp',
             'ScriptGCEvent.h',
             'ScriptHeapSnapshot.cpp',
             'ScriptHeapSnapshot.h',
             'ScriptPreprocessor.cpp',
             'ScriptPreprocessor.h',
             'ScriptProfiler.cpp',
             'ScriptProfiler.h',
             'ScriptPromise.cpp',
             'ScriptPromise.h',
+            'ScriptDebugServer.cpp',
+            'ScriptDebugServer.h',
             'ScriptPromiseResolver.cpp',
             'ScriptPromiseResolver.h',
             'ScriptPromiseProperties.h',
             'ScriptPromiseProperty.h',
             'ScriptPromisePropertyBase.cpp',
             'ScriptPromisePropertyBase.h',
             'ScriptSourceCode.h',
             'ScriptState.cpp',
             'ScriptState.h',
             'ScriptString.cpp',
@@ skipping 47 matching lines @@
             'V8ThrowException.cpp',
             'V8ThrowException.h',
             'V8ValueCache.cpp',
             'V8ValueCache.h',
             'WindowProxy.cpp',
             'WindowProxy.h',
             'WrapperTypeInfo.h',
         ],
     },
 }