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

extensions/renderer/guest_view/mime_handler_view/mime_handler_view_container.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "extensions/renderer/guest_view/mime_handler_view/mime_handler_view_container.h"
 
 #include <map>
 #include <set>
 
 #include "base/macros.h"
@@ skipping 224 matching lines @@
   v8::Context::Scope context_scope(
       render_frame()->GetWebFrame()->mainWorldScriptContext());
 
   // TODO(lazyboy,nasko): The WebLocalFrame branch is not used when running
   // on top of out-of-process iframes. Remove it once the code is converted.
   v8::Local<v8::Object> guest_proxy_window;
   if (guest_proxy_frame->isWebLocalFrame()) {
     guest_proxy_window =
         guest_proxy_frame->mainWorldScriptContext()->Global();
   } else {
-    guest_proxy_window = guest_proxy_frame->toWebRemoteFrame()->globalProxy();
+    guest_proxy_window = guest_proxy_frame->toWebRemoteFrame()
+                             ->deprecatedMainWorldScriptContext()
+                             ->Global();
   }
   gin::Dictionary window_object(isolate, guest_proxy_window);
   v8::Local<v8::Function> post_message;
   if (!window_object.Get(std::string(kPostMessageName), &post_message))
     return;
 
   v8::Local<v8::Value> args[] = {
       message,
       // Post the message to any domain inside the browser plugin. The embedder
       // should already know what is embedded.
@@ skipping 73 matching lines @@
   if (!render_frame())
     return;
 
   render_frame()->Send(
       new ExtensionsGuestViewHostMsg_CreateMimeHandlerViewGuest(
           render_frame()->GetRoutingID(), view_id_, element_instance_id(),
           element_size_));
 }
 
 }  // namespace extensions