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

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

Index: third_party/WebKit/Source/core/frame/RemoteFrame.h
diff --git a/third_party/WebKit/Source/core/frame/RemoteFrame.h b/third_party/WebKit/Source/core/frame/RemoteFrame.h
index bf3a09a43aa861f423513981e67840a757368720..fd6ae285767bc2eeb3f5448f30497a00d012fa1a 100644
--- a/third_party/WebKit/Source/core/frame/RemoteFrame.h
+++ b/third_party/WebKit/Source/core/frame/RemoteFrame.h
@@ -42,6 +42,7 @@ class CORE_EXPORT RemoteFrame final : public Frame {
   bool prepareForCommit() override;
   bool shouldClose() override;
   void setDocumentHasReceivedUserGesture() override;
+  WindowProxyManagerBase* getWindowProxyManager() const override;
 
   // FIXME: Remove this method once we have input routing in the browser
   // process. See http://crbug.com/339659.
@@ -62,9 +63,6 @@ class CORE_EXPORT RemoteFrame final : public Frame {
  private:
   RemoteFrame(RemoteFrameClient*, FrameHost*, FrameOwner*);
 
-  // Internal Frame helper overrides:
-  WindowProxyManagerBase* getWindowProxyManager() const override;
-
   // Intentionally private to prevent redundant checks when the type is
   // already RemoteFrame.
   bool isLocalFrame() const override { return false; }