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

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

Index: third_party/WebKit/Source/bindings/core/v8/ScriptState.h
diff --git a/third_party/WebKit/Source/bindings/core/v8/ScriptState.h b/third_party/WebKit/Source/bindings/core/v8/ScriptState.h
index 4d8d0febb920191cc1012eb5301d35a3031deded..e3fe7dd6c92dd53637bc90e03154af77eda81e08 100644
--- a/third_party/WebKit/Source/bindings/core/v8/ScriptState.h
+++ b/third_party/WebKit/Source/bindings/core/v8/ScriptState.h
@@ -155,9 +155,6 @@ class CORE_EXPORT ScriptState : public RefCounted<ScriptState> {
   }
   void detachGlobalObject();
   void clearContext() { return m_context.clear(); }
-#if DCHECK_IS_ON()
-  bool isGlobalObjectDetached() const { return m_globalObjectDetached; }
-#endif
 
   V8PerContextData* perContextData() const { return m_perContextData.get(); }
   void disposePerContextData();
@@ -183,10 +180,6 @@ class CORE_EXPORT ScriptState : public RefCounted<ScriptState> {
   // disposePerContextData() once you no longer need V8PerContextData.
   // Otherwise, the v8::Context will leak.
   std::unique_ptr<V8PerContextData> m_perContextData;
-
-#if DCHECK_IS_ON()
-  bool m_globalObjectDetached = false;
-#endif
 };
 
 // ScriptStateProtectingContext keeps the context associated with the