Use v8::Context::NewRemoteContext in RemoteWindowProxy.

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

Index: third_party/WebKit/Source/bindings/core/v8/RemoteWindowProxy.h
diff --git a/third_party/WebKit/Source/bindings/core/v8/RemoteWindowProxy.h b/third_party/WebKit/Source/bindings/core/v8/RemoteWindowProxy.h
index 3e36140d614243ceb2fdbe7216aff534335a3a6f..69b5779caed9e3ffe8de756ecc77ba602987271d 100644
--- a/third_party/WebKit/Source/bindings/core/v8/RemoteWindowProxy.h
+++ b/third_party/WebKit/Source/bindings/core/v8/RemoteWindowProxy.h
@@ -32,7 +32,6 @@
 #define RemoteWindowProxy_h
 
 #include "bindings/core/v8/DOMWrapperWorld.h"
-#include "bindings/core/v8/ScriptState.h"
 #include "bindings/core/v8/WindowProxy.h"
 #include "core/frame/RemoteFrame.h"
 #include "v8/include/v8.h"
@@ -48,7 +47,6 @@ class RemoteWindowProxy final : public WindowProxy {
  public:
   static RemoteWindowProxy* create(v8::Isolate* isolate,
                                    RemoteFrame& frame,
-
                                    RefPtr<DOMWrapperWorld> world) {
     return new RemoteWindowProxy(isolate, frame, std::move(world));
   }
@@ -68,8 +66,6 @@ class RemoteWindowProxy final : public WindowProxy {
   // Associates the window wrapper and its prototype chain with the native
   // DOMWindow object. Also does some more Window-specific initialization.
   void setupWindowPrototypeChain();
-
-  RefPtr<ScriptState> m_scriptState;
 };
 
 }  // namespace blink