chromeos: Eliminate WmWindow from //ash/system

ash/system/palette/palette_tool.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_SYSTEM_PALETTE_PALETTE_TOOL_H_
 #define ASH_SYSTEM_PALETTE_PALETTE_TOOL_H_
 
 #include <map>
 #include <memory>
 #include <vector>
 
 #include "ash/ash_export.h"
 #include "ash/system/palette/palette_ids.h"
 #include "base/callback.h"
 #include "base/macros.h"
 #include "ui/gfx/vector_icon_types.h"
 
+namespace aura {
+class Window;
+}
+
 namespace gfx {
 struct VectorIcon;
 }
 
 namespace views {
 class View;
 }
 
 namespace ash {
 
-class WmWindow;
-
 enum class PaletteGroup;
 enum class PaletteToolId;
 class PaletteToolManager;
 
 // A PaletteTool is a generalized action inside of the palette menu in the
 // shelf. Only one tool per group is active at any given time. When the tool is
 // active, it should be showing some specializied UI. The tool is no longer
 // active if it completes its action, if the user selects another tool with the
 // same group, or if the user just cancels the action from the palette.
 class ASH_EXPORT PaletteTool {
  public:
   class Delegate {
    public:
-    Delegate() {}
-    virtual ~Delegate() {}
-
     // Enable or disable a specific tool.
     virtual void EnableTool(PaletteToolId tool_id) = 0;
     virtual void DisableTool(PaletteToolId tool_id) = 0;
 
     // Hide the entire palette. This should not change any tool state.
     virtual void HidePalette() = 0;
 
     // Hide the entire palette without showing a hide animation.
     virtual void HidePaletteImmediately() = 0;
 
     // Returns the root window.
-    virtual WmWindow* GetWindow() = 0;
+    virtual aura::Window* GetWindow() = 0;
 
     // Record usage of each pen palette option.
     virtual void RecordPaletteOptionsUsage(PaletteTrayOptions option) = 0;
 
     // Record mode cancellation of pen palette.
     virtual void RecordPaletteModeCancellation(PaletteModeCancelType type) = 0;
 
-   private:
-    DISALLOW_COPY_AND_ASSIGN(Delegate);
+   protected:
+    virtual ~Delegate() {}
   };
 
   // Adds all available PaletteTool instances to the tool_manager.
   static void RegisterToolInstances(PaletteToolManager* tool_manager);
 
   // |delegate| must outlive this tool instance.
   explicit PaletteTool(Delegate* delegate);
   virtual ~PaletteTool();
 
   // The group this tool belongs to. Only one tool per group can be active at
@@ skipping 34 matching lines @@
 
   // Unowned pointer to the delegate. The delegate should outlive this instance.
   Delegate* delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(PaletteTool);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_PALETTE_PALETTE_TOOL_H_