Connects PostMessage() for OOPIFs

components/html_viewer/document_resource_waiter.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/html_viewer/document_resource_waiter.h"
 
 #include "components/html_viewer/global_state.h"
 #include "components/html_viewer/html_document_oopif.h"
 #include "components/html_viewer/html_frame_tree_manager.h"
 #include "components/view_manager/public/cpp/view.h"
@@ skipping 71 matching lines @@
 }
 
 void DocumentResourceWaiter::OnFrameClientPropertyChanged(
     uint32_t frame_id,
     const mojo::String& name,
     mojo::Array<uint8_t> new_value) {
   // It is assumed we receive OnConnect() (which unbinds) before anything else.
   NOTREACHED();
 }
 
+void DocumentResourceWaiter::PostMessage(uint32_t source_frame_id,
+                                         uint32_t target_frame_id,
+                                         mandoline::HTMLMessageEventPtr event) {
+  // It is assumed we receive OnConnect() (which unbinds) before anything else.
+  NOTREACHED();
+}
+
 }  // namespace html_viewer