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

third_party/WebKit/public/web/WebRemoteFrame.h

Index: third_party/WebKit/public/web/WebRemoteFrame.h
diff --git a/third_party/WebKit/public/web/WebRemoteFrame.h b/third_party/WebKit/public/web/WebRemoteFrame.h
index 28f973ff88ca771c5c7f58e40980f931b4f7d2e3..01cf02d438acf9805de9cdd21abc8043198744aa 100644
--- a/third_party/WebKit/public/web/WebRemoteFrame.h
+++ b/third_party/WebKit/public/web/WebRemoteFrame.h
@@ -11,6 +11,10 @@
 #include "public/web/WebFrame.h"
 #include "public/web/WebSandboxFlags.h"
 
+namespace v8 {
+class Object;
+};
+
 namespace blink {
 
 enum class WebTreeScopeType;
@@ -98,7 +102,7 @@ class WebRemoteFrame : public WebFrame {
   // Temporary method to allow embedders to get the script context of a
   // remote frame. This should only be used by legacy code that has not yet
   // migrated over to the new OOPI infrastructure.
-  virtual v8::Local<v8::Context> deprecatedMainWorldScriptContext() const = 0;
+  virtual v8::Local<v8::Object> globalProxy() const = 0;
 
  protected:
   explicit WebRemoteFrame(WebTreeScopeType scope) : WebFrame(scope) {}