Update ash to use new devtools base agent

components/ui_devtools/devtools_client.cc

 // Copyright 2016 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/ui_devtools/devtools_client.h"
 
 #include "components/ui_devtools/devtools_server.h"
 
 namespace ui {
 namespace devtools {
 
 UiDevToolsClient::UiDevToolsClient(const std::string& name,
                                    UiDevToolsServer* server)
     : name_(name),
       connection_id_(kNotConnected),
       dispatcher_(this),
       server_(server) {
   DCHECK(server_);
 }
 
 UiDevToolsClient::~UiDevToolsClient() {}
 
 void UiDevToolsClient::AddAgent(std::unique_ptr<UiDevToolsAgent> agent) {
   agent->Init(&dispatcher_);
   agents_.push_back(std::move(agent));
 }
 
-void UiDevToolsClient::AddDOMBackend(
-    std::unique_ptr<protocol::DOM::Backend> dom_backend) {
-  dom_backend_ = std::move(dom_backend);
-  protocol::DOM::Dispatcher::wire(&dispatcher_, dom_backend_.get());
-}
-
 void UiDevToolsClient::Dispatch(const std::string& data) {
   dispatcher_.dispatch(protocol::parseJSON(data));
 }
 
 bool UiDevToolsClient::connected() const {
   return connection_id_ != kNotConnected;
 }
 
 void UiDevToolsClient::set_connection_id(int connection_id) {
   connection_id_ = connection_id;
@@ skipping 12 matching lines @@
   if (connected())
     server_->SendOverWebSocket(connection_id_, message);
 }
 
 void UiDevToolsClient::flushProtocolNotifications() {
   NOTIMPLEMENTED();
 }
 
 }  // namespace devtools
 }  // namespace ui