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 2b8671ed8b6b2cc82af45e39243850034f3d5263..3bb1eba777250dadcb130205aff4fa20cc2f1a5e 100644
--- a/third_party/WebKit/Source/core/frame/LocalFrame.h
+++ b/third_party/WebKit/Source/core/frame/LocalFrame.h
@@ -122,6 +122,7 @@ class CORE_EXPORT LocalFrame final : public Frame,
   bool prepareForCommit() override;
   void didChangeVisibilityState() override;
   void setDocumentHasReceivedUserGesture() override;
+  WindowProxyManagerBase* getWindowProxyManager() const override;
 
   void detachChildren();
   void documentAttached();
@@ -235,8 +236,6 @@ 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; }