Revert of Switch RemoteWindowProxy to use v8::Context::NewRemoteContext.

third_party/WebKit/Source/bindings/core/v8/ScriptState.cpp

Index: third_party/WebKit/Source/bindings/core/v8/ScriptState.cpp
diff --git a/third_party/WebKit/Source/bindings/core/v8/ScriptState.cpp b/third_party/WebKit/Source/bindings/core/v8/ScriptState.cpp
index 561d28e39cd2632c3f4787009a9ad248ebdb2614..4dcdb8177ec21b16fdfdf722629bba98c27c976b 100644
--- a/third_party/WebKit/Source/bindings/core/v8/ScriptState.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/ScriptState.cpp
@@ -36,7 +36,8 @@
     : m_isolate(context->GetIsolate()),
       m_context(m_isolate, context),
       m_world(world),
-      m_perContextData(V8PerContextData::create(context)) {
+      m_perContextData(V8PerContextData::create(context))
+{
   DCHECK(m_world);
   m_context.setWeak(this, &contextCollectedCallback);
   context->SetAlignedPointerInEmbedderData(v8ContextPerContextDataIndex, this);
@@ -50,6 +51,9 @@
 void ScriptState::detachGlobalObject() {
   ASSERT(!m_context.isEmpty());
   context()->DetachGlobal();
+#if DCHECK_IS_ON()
+  m_globalObjectDetached = true;
+#endif
 }
 
 void ScriptState::disposePerContextData() {