Create a unified UIElement interface for Widget, View and Window.

ash/common/devtools/ui_element.h

Index: ash/common/devtools/ui_element.h
diff --git a/ash/common/devtools/ui_element.h b/ash/common/devtools/ui_element.h
new file mode 100644
index 0000000000000000000000000000000000000000..acca1660eb5e0ef08a4c4a45d6f999a67813a40c
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+++ b/ash/common/devtools/ui_element.h
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+// Copyright 2017 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_UI_ELEMENT_H_
+#define ASH_COMMON_DEVTOOLS_UI_ELEMENT_H_
+
+#include "ash/ash_export.h"
+#include "ash/common/devtools/ui_element_delegate.h"
+#include "ui/gfx/geometry/rect.h"
+
+namespace ash {
+namespace devtools {
+
+class ASH_EXPORT UIElement : public UIElementDelegate {
+ public:
+  UIElement();
+  ~UIElement();
+  static UIElement* GetInstance();
+  UIElement(int node_id);
+
+  static UIElement* ConvertNodeIdToUIElement(int node_id);
+  virtual bool GetBounds(gfx::Rect* bounds){};
+  virtual bool SetBounds(const gfx::Rect& bounds){};
+  virtual bool GetVisible(bool* visible){};
+  virtual bool SetVisible(bool visible){};
+
+  int GetNodeId() const;
+
+ private:
+  int node_id_;
+  std::unordered_map<int, UIElement*> node_id_to_ui_element;
+  static UIElement* instance_;
+
+  DISALLOW_COPY_AND_ASSIGN(UIElement);
+};
+
+}  // namespace devtools
+}  // namespace ash
+
+#endif  // ASH_COMMON_DEVTOOLS_UI_ELEMENT_H_