Update ash to use new devtools base agent

ash/common/wm_shell.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 "ash/common/wm_shell.h"
 
 #include <utility>
 
 #include "ash/common/accelerators/accelerator_controller.h"
 #include "ash/common/accelerators/ash_focus_manager_factory.h"
@@ skipping 75 matching lines @@
   views::FocusManagerFactory::Install(new AshFocusManagerFactory);
 
   wallpaper_controller_.reset(new WallpaperController(blocking_pool_));
 
   // Start devtools server
   devtools_server_ = ui::devtools::UiDevToolsServer::Create();
   if (devtools_server_) {
     auto dom_backend = base::MakeUnique<devtools::AshDevToolsDOMAgent>(this);
     auto devtools_client = base::MakeUnique<ui::devtools::UiDevToolsClient>(
         "Ash", devtools_server_.get());
-    devtools_client->AddDOMBackend(std::move(dom_backend));
+    devtools_client->AddAgent(std::move(dom_backend));
     devtools_server_->AttachClient(std::move(devtools_client));
   }
 }
 
 void WmShell::Shutdown() {
   // These members access WmShell in their destructors.
   wallpaper_controller_.reset();
   accessibility_delegate_.reset();
 
   // ShelfWindowWatcher has window observers and a pointer to the shelf model.
@@ skipping 287 matching lines @@
 void WmShell::DeleteToastManager() {
   toast_manager_.reset();
 }
 
 void WmShell::SetAcceleratorController(
     std::unique_ptr<AcceleratorController> accelerator_controller) {
   accelerator_controller_ = std::move(accelerator_controller);
 }
 
 }  // namespace ash