More html_viewer OOPIF changes

mandoline/tab/frame_connection.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 "mandoline/tab/frame_connection.h"
 
 #include "mojo/application/public/cpp/application_connection.h"
 #include "mojo/application/public/cpp/application_impl.h"
 
 namespace mandoline {
 
 FrameConnection::FrameConnection() : application_connection_(nullptr) {
 }
 
 FrameConnection::~FrameConnection() {
 }
 
 void FrameConnection::Init(mojo::ApplicationImpl* app,
                            mojo::URLRequestPtr request,
                            mojo::ViewManagerClientPtr* view_manage_client) {
   DCHECK(!application_connection_);
   application_connection_ = app->ConnectToApplication(request.Pass());
   application_connection_->ConnectToService(view_manage_client);
   application_connection_->ConnectToService(&frame_tree_client_);
+  frame_tree_client_.set_connection_error_handler([]() {
+    // TODO(sky): implement this.
+    NOTIMPLEMENTED();
+  });
 }
 
 }  // namespace mandoline