It is time.

ui/accessibility/platform/ax_platform_node_base.h

Index: ui/accessibility/platform/ax_platform_node_base.h
diff --git a/ui/accessibility/platform/ax_platform_node_base.h b/ui/accessibility/platform/ax_platform_node_base.h
deleted file mode 100644
index fcc0f5c5918ac3f9c46dc2485d72e402d8e0590b..0000000000000000000000000000000000000000
--- a/ui/accessibility/platform/ax_platform_node_base.h
+++ /dev/null
@@ -1,44 +0,0 @@
-// Copyright 2014 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 UI_ACCESSIBILITY_PLATFORM_AX_PLATFORM_NODE_BASE_H_
-#define UI_ACCESSIBILITY_PLATFORM_AX_PLATFORM_NODE_BASE_H_
-
-#include "ui/accessibility/ax_enums.h"
-#include "ui/accessibility/platform/ax_platform_node.h"
-#include "ui/gfx/geometry/rect.h"
-#include "ui/gfx/native_widget_types.h"
-
-namespace ui {
-
-class AXPlatformNodeDelegate;
-
-class AXPlatformNodeBase : public AXPlatformNode {
- public:
-   virtual void Init(AXPlatformNodeDelegate* delegate);
-
-  // These are simple wrappers to our delegate.
-  AXRole GetRole() const;
-  gfx::Rect GetBoundsInScreen() const;
-  gfx::NativeViewAccessible GetParent();
-  int GetChildCount();
-  gfx::NativeViewAccessible ChildAtIndex(int index);
-
-  // AXPlatformNode
-  void Destroy() override;
-  gfx::NativeViewAccessible GetNativeViewAccessible() override;
-
- protected:
-  AXPlatformNodeBase();
-  ~AXPlatformNodeBase() override;
-
-  AXPlatformNodeDelegate* delegate_;  // Weak. Owns this.
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(AXPlatformNodeBase);
-};
-
-}  // namespace ui
-
-#endif  // UI_ACCESSIBILITY_PLATFORM_AX_PLATFORM_NODE_BASE_H_