Implement the palette help and options buttons.

ash/common/system/chromeos/palette/palette_tray.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_BUTTON_TRAY_H_
 #define ASH_COMMON_SYSTEM_CHROMEOS_PALETTE_PALETTE_BUTTON_TRAY_H_
 
 #include <map>
 #include <memory>
 
@@ skipping 32 matching lines @@
   // SessionStateObserver:
   void SessionStateChanged(SessionStateDelegate::SessionState state) override;
 
   // TrayBackgroundView:
   void ClickedOutsideBubble() override;
   base::string16 GetAccessibleNameForTray() override;
   void HideBubbleWithView(const views::TrayBubbleView* bubble_view) override;
   void SetShelfAlignment(ShelfAlignment alignment) override;
   void AnchorUpdated() override;
 
+  // PaletteToolManager::Delegate:
+  void HidePalette() override;
+
  private:
   // views::TrayBubbleView::Delegate:
   void BubbleViewDestroyed() override;
   void OnMouseEnteredView() override;
   void OnMouseExitedView() override;
   base::string16 GetAccessibleNameForBubble() override;
   gfx::Rect GetAnchorRect(views::Widget* anchor_widget,
                           AnchorType anchor_type,
                           AnchorAlignment anchor_alignment) const override;
   void OnBeforeBubbleWidgetInit(
       views::Widget* anchor_widget,
       views::Widget* bubble_widget,
       views::Widget::InitParams* params) const override;
   void HideBubble(const views::TrayBubbleView* bubble_view) override;
 
   // PaletteToolManager::Delegate:
-  void HidePalette() override;
   void OnActiveToolChanged() override;
   WmWindow* GetWindow() override;
 
   // Creates a new border for the icon. The padding is determined based on the
   // alignment of the shelf.
   void SetIconBorderForShelfAlignment();
 
   // Updates the tray icon from the palette tool manager.
   void UpdateTrayIcon();
 
   // Sets the icon to visible if the palette can be used.
   void UpdateIconVisibility();
 
   bool OpenBubble();
   void AddToolsToView(views::View* host);
 
   std::unique_ptr<PaletteToolManager> palette_tool_manager_;
   std::unique_ptr<TrayBubbleWrapper> bubble_;
 
   // Weak pointer, will be parented by TrayContainer for its lifetime.
   views::ImageView* icon_;
 
   DISALLOW_COPY_AND_ASSIGN(PaletteTray);
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_SYSTEM_CHROMEOS_PALETTE_PALETTE_BUTTON_TRAY_H_