Add ash devtools client

ash/common/devtools/devtools_client_dom.h

+// 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.
+
+#ifndef ASH_COMMON_DEVTOOLS_DEVTOOLS_CLIENT_DOM_H_
+#define ASH_COMMON_DEVTOOLS_DEVTOOLS_CLIENT_DOM_H_
+
+#include "ash/common/wm_shell.h"
+#include "components/ui_devtools/DOM.h"
+
+namespace ui {

[sadrul, 2016/10/26 19:20:41]

Should be namespace ash

[Sarmad Hashmi, 2016/10/26 20:22:58]

Done.

+namespace devtools {
+
+class AshDevToolsClientDOM : public protocol::DOM::Backend {
+ public:
+  explicit AshDevToolsClientDOM(ash::WmShell* shell);
+  ~AshDevToolsClientDOM() override;
+
+ private:
+  std::unique_ptr<protocol::DOM::Node> BuildInitialTree();
+
+  // DOM::Backend
+  void enable(protocol::ErrorString* error) override {}
+  void disable(protocol::ErrorString* error) override {}
+  void getDocument(protocol::ErrorString* error,
+                   std::unique_ptr<protocol::DOM::Node>* out_root) override;
+
+  ash::WmShell* shell_;
+
+  DISALLOW_COPY_AND_ASSIGN(AshDevToolsClientDOM);
+};
+
+}  // namespace devtools
+}  // namespace ui
+
+#endif  // ASH_COMMON_DEVTOOLS_DEVTOOLS_CLIENT_DOM_H_