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

third_party/WebKit/Source/core/frame/LocalFrame.h

Index: third_party/WebKit/Source/core/frame/LocalFrame.h
diff --git a/third_party/WebKit/Source/core/frame/LocalFrame.h b/third_party/WebKit/Source/core/frame/LocalFrame.h
index da489be69d7225e125b14e155c80f18b26159259..fbe9ac6af1d8f9af479ffae8589e86a4dd537325 100644
--- a/third_party/WebKit/Source/core/frame/LocalFrame.h
+++ b/third_party/WebKit/Source/core/frame/LocalFrame.h
@@ -121,6 +121,7 @@ class CORE_EXPORT LocalFrame final : public Frame,
   void printNavigationWarning(const String&) override;
   bool prepareForCommit() override;
   void didChangeVisibilityState() override;
+  WindowProxyManagerBase* getWindowProxyManager() const override;
 
   void detachChildren();
   void documentAttached();
@@ -232,8 +233,6 @@ class CORE_EXPORT LocalFrame final : public Frame,
              InterfaceProvider*,
              InterfaceRegistry*);
 
-  // Internal Frame helper overrides:
-  WindowProxyManagerBase* getWindowProxyManager() const override;
   // Intentionally private to prevent redundant checks when the type is
   // already LocalFrame.
   bool isLocalFrame() const override { return true; }