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

ash/common/system/chromeos/palette/palette_tool_manager.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_MANAGER_H_
 #define ASH_COMMON_SYSTEM_CHROMEOS_PALETTE_PALETTE_TOOL_MANAGER_H_
 
 #include <map>
 #include <memory>
 #include <vector>
@@ skipping 57 matching lines @@
   void DeactivateTool(PaletteToolId tool_id);
 
   // Returns true if the given tool is active.
   bool IsToolActive(PaletteToolId tool_id);
 
   // Returns the active tool for the given group.
   PaletteToolId GetActiveTool(PaletteGroup group);
 
   // Fetch the active tray icon for the given tool. Returns
   // gfx::VectorIconId::VECTOR_ICON_NONE if not available.
-  gfx::VectorIconId GetActiveTrayIcon(PaletteToolId tool_id);
+  const gfx::VectorIcon& GetActiveTrayIcon(PaletteToolId tool_id) const;
 
   // Create views for all of the registered tools.
   std::vector<PaletteToolView> CreateViews();
 
   // Called when the views returned by CreateViews have been destroyed. This
   // should clear any (now) stale references.
   void NotifyViewsDestroyed();
 
  private:
   // PaleteTool::Delegate overrides.
   void EnableTool(PaletteToolId tool_id) override;
   void DisableTool(PaletteToolId tool_id) override;
   void HidePalette() override;
   WmWindow* GetWindow() override;
 
-  PaletteTool* FindToolById(PaletteToolId tool_id);
+  PaletteTool* FindToolById(PaletteToolId tool_id) const;
 
   // Unowned pointer to the delegate to provide external functionality.
   Delegate* delegate_;
 
   // Unowned pointer to the active tool / group.
   std::map<PaletteGroup, PaletteTool*> active_tools_;
 
   // Owned list of all tools.
   std::vector<std::unique_ptr<PaletteTool>> tools_;
 
   DISALLOW_COPY_AND_ASSIGN(PaletteToolManager);
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_SYSTEM_CHROMEOS_PALETTE_PALETTE_TOOL_MANAGER_H_