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

components/guest_view/renderer/guest_view_request.cc

 // Copyright 2015 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 "components/guest_view/renderer/guest_view_request.h"
 
 #include <tuple>
 #include <utility>
 
 #include "components/guest_view/common/guest_view_messages.h"
@@ skipping 79 matching lines @@
     return;
 
   v8::HandleScope handle_scope(isolate());
   blink::WebFrame* frame = guest_proxy_render_view->GetWebView()->mainFrame();
   // 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::Value> window;
   if (frame->isWebLocalFrame()) {
     window = frame->mainWorldScriptContext()->Global();
   } else {
-    window =
-        frame->toWebRemoteFrame()->deprecatedMainWorldScriptContext()->Global();
+    window = frame->toWebRemoteFrame()->globalProxy();
   }
 
   const int argc = 1;
   std::unique_ptr<v8::Local<v8::Value>[]> argv(new v8::Local<v8::Value>[argc]);
   argv[0] = window;
 
   // Call the AttachGuest API's callback with the guest proxy as the first
   // parameter.
   ExecuteCallbackIfAvailable(argc, std::move(argv));
 }
@@ skipping 14 matching lines @@
 
   container()->render_frame()->DetachGuest(container()->element_instance_id());
 }
 
 void GuestViewDetachRequest::HandleResponse(const IPC::Message& message) {
   DCHECK(message.type() == GuestViewMsg_GuestDetached::ID);
   ExecuteCallbackIfAvailable(0 /* argc */, nullptr);
 }
 
 }  // namespace guest_view