Move a bunch of ash-only vector icons to ash/.

ash/common/system/chromeos/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_COMMON_SYSTEM_CHROMEOS_PALETTE_PALETTE_TOOL_H_
 #define ASH_COMMON_SYSTEM_CHROMEOS_PALETTE_PALETTE_TOOL_H_
 
 #include <map>
 #include <memory>
 #include <vector>
 
 #include "ash/ash_export.h"
 #include "base/callback.h"
 #include "base/macros.h"
 #include "ui/gfx/vector_icon_types.h"
 
+namespace gfx {
+struct VectorIcon;
+}
+
 namespace views {
 class View;
 }
 
 namespace ash {
 
 class WmWindow;
 
 enum class PaletteGroup;
 enum class PaletteToolId;
@@ skipping 50 matching lines @@
   virtual void OnDisable();
 
   // Create a view that will be used in the palette, or nullptr if this tool
   // should not be displayed. The view is owned by the caller. OnViewDestroyed
   // is called when the view has been deallocated by its owner.
   virtual views::View* CreateView() = 0;
   virtual void OnViewDestroyed() = 0;
 
   // Returns an icon to use in the tray if this tool is active. Only one tool
   // (per-group) should ever have an active icon at any given time.
-  virtual gfx::VectorIconId GetActiveTrayIcon();
+  virtual const gfx::VectorIcon& GetActiveTrayIcon() const;
 
  protected:
   // Enables/disables the tool.
   bool enabled() const { return enabled_; }
 
   Delegate* delegate() { return delegate_; }
 
  private:
   bool enabled_ = false;
 
   // Unowned pointer to the delegate. The delegate should outlive this instance.
   Delegate* delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(PaletteTool);
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_SYSTEM_CHROMEOS_PALETTE_PALETTE_TOOL_H_