Move DevTools out of ash and turn it to a component.

ash/devtools/ash_devtools_dom_agent.h

Index: ash/devtools/ash_devtools_dom_agent.h
diff --git a/ash/devtools/ash_devtools_dom_agent.h b/ash/devtools/ash_devtools_dom_agent.h
deleted file mode 100644
index 8a171fea93b71589b06cfba33769106936e97637..0000000000000000000000000000000000000000
--- a/ash/devtools/ash_devtools_dom_agent.h
+++ /dev/null
@@ -1,109 +0,0 @@
-// 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_DEVTOOLS_ASH_DEVTOOLS_DOM_AGENT_H_
-#define ASH_DEVTOOLS_ASH_DEVTOOLS_DOM_AGENT_H_
-
-#include "ash/ash_export.h"
-#include "ash/devtools/ui_element_delegate.h"
-#include "base/macros.h"
-#include "components/ui_devtools/DOM.h"
-#include "components/ui_devtools/devtools_base_agent.h"
-#include "ui/aura/env_observer.h"
-#include "ui/views/view.h"
-#include "ui/views/widget/widget.h"
-
-namespace aura {
-class Window;
-}
-
-namespace ash {
-namespace devtools {
-
-class UIElement;
-
-class ASH_EXPORT AshDevToolsDOMAgentObserver {
- public:
-  // TODO(thanhph): Use UIElement* as input argument instead.
-  virtual void OnNodeBoundsChanged(int node_id) = 0;
-};
-
-class ASH_EXPORT AshDevToolsDOMAgent
-    : public NON_EXPORTED_BASE(ui::devtools::UiDevToolsBaseAgent<
-                               ui::devtools::protocol::DOM::Metainfo>),
-      public UIElementDelegate,
-      public aura::EnvObserver {
- public:
-  AshDevToolsDOMAgent();
-  ~AshDevToolsDOMAgent() override;
-
-  // DOM::Backend:
-  ui::devtools::protocol::Response disable() override;
-  ui::devtools::protocol::Response getDocument(
-      std::unique_ptr<ui::devtools::protocol::DOM::Node>* out_root) override;
-  ui::devtools::protocol::Response highlightNode(
-      std::unique_ptr<ui::devtools::protocol::DOM::HighlightConfig>
-          highlight_config,
-      ui::devtools::protocol::Maybe<int> node_id) override;
-  ui::devtools::protocol::Response hideHighlight() override;
-
-  // UIElementDelegate:
-  void OnUIElementAdded(UIElement* parent, UIElement* child) override;
-  void OnUIElementReordered(UIElement* parent, UIElement* child) override;
-  void OnUIElementRemoved(UIElement* ui_element) override;
-  void OnUIElementBoundsChanged(UIElement* ui_element) override;
-  bool IsHighlightingWindow(aura::Window* window) override;
-
-  void AddObserver(AshDevToolsDOMAgentObserver* observer);
-  void RemoveObserver(AshDevToolsDOMAgentObserver* observer);
-  UIElement* GetElementFromNodeId(int node_id);
-  UIElement* window_element_root() const { return window_element_root_.get(); };
-  const std::vector<aura::Window*>& root_windows() const {
-    return root_windows_;
-  };
-
- private:
-  // aura::EnvObserver:
-  void OnWindowInitialized(aura::Window* window) override {}
-  void OnHostInitialized(aura::WindowTreeHost* host) override;
-
-  void OnNodeBoundsChanged(int node_id);
-  std::unique_ptr<ui::devtools::protocol::DOM::Node> BuildInitialTree();
-  std::unique_ptr<ui::devtools::protocol::DOM::Node> BuildTreeForUIElement(
-      UIElement* ui_element);
-  std::unique_ptr<ui::devtools::protocol::DOM::Node> BuildTreeForWindow(
-      UIElement* window_element_root,
-      aura::Window* window);
-  std::unique_ptr<ui::devtools::protocol::DOM::Node> BuildTreeForRootWidget(
-      UIElement* widget_element,
-      views::Widget* widget);
-  std::unique_ptr<ui::devtools::protocol::DOM::Node> BuildTreeForView(
-      UIElement* view_element,
-      views::View* view);
-  void RemoveDomNode(UIElement* ui_element);
-  void Reset();
-  void InitializeHighlightingWidget();
-  void UpdateHighlight(
-      const std::pair<aura::Window*, gfx::Rect>& window_and_bounds,
-      SkColor background,
-      SkColor border);
-  ui::devtools::protocol::Response HighlightNode(
-      std::unique_ptr<ui::devtools::protocol::DOM::HighlightConfig>
-          highlight_config,
-      int node_id);
-
-  bool is_building_tree_;
-  std::unique_ptr<UIElement> window_element_root_;
-  std::unordered_map<int, UIElement*> node_id_to_ui_element_;
-  std::unique_ptr<views::Widget> widget_for_highlighting_;
-  std::vector<aura::Window*> root_windows_;
-  base::ObserverList<AshDevToolsDOMAgentObserver> observers_;
-
-  DISALLOW_COPY_AND_ASSIGN(AshDevToolsDOMAgent);
-};
-
-}  // namespace devtools
-}  // namespace ash
-
-#endif  // ASH_DEVTOOLS_ASH_DEVTOOLS_DOM_AGENT_H_