Revert of 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 2336c92fffe84e812663f424b19768ba9b060e23..ed6da8795400797d8cab46609bd0bba30e52a1d9 100644
--- a/third_party/WebKit/Source/core/frame/LocalFrame.h
+++ b/third_party/WebKit/Source/core/frame/LocalFrame.h
@@ -122,7 +122,6 @@
   void printNavigationWarning(const String&) override;
   bool prepareForCommit() override;
   void didChangeVisibilityState() override;
-  WindowProxyManagerBase* getWindowProxyManager() const override;
 
   void detachChildren();
   void documentAttached();
@@ -235,6 +234,8 @@
              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; }