ash/chromeos: Add shift-alt-p shortcut to open palette.

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 41 matching lines @@
   void HideBubbleWithView(const views::TrayBubbleView* bubble_view) override;
   void SetShelfAlignment(ShelfAlignment alignment) override;
   void AnchorUpdated() override;
 
   // PaletteToolManager::Delegate:
   void HidePalette() override;
 
   // Returns true if the shelf should not autohide.
   bool ShouldBlockShelfAutoHide() const;
 
+  bool OpenBubble();
+
  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(
@@ skipping 15 matching lines @@
 
   // Sets the icon to visible if the palette can be used.
   void UpdateIconVisibility();
 
   // Called when a stylus inserted or removed event is received.
   void OnStylusStateChanged(ui::StylusState stylus_state);
 
   // Called when the palette enabled pref has changed.
   void OnPaletteEnabledPrefChanged(bool enabled);
 
-  bool OpenBubble();
   void AddToolsToView(views::View* host);
 
   std::unique_ptr<PaletteToolManager> palette_tool_manager_;
   std::unique_ptr<TrayBubbleWrapper> bubble_;
 
   // Manages the callback OnPaletteEnabledPrefChanged callback registered to
   // the PaletteDelegate instance.
   std::unique_ptr<PaletteDelegate::EnableListenerSubscription>
       palette_enabled_subscription_;
 
   // Weak pointer, will be parented by TrayContainer for its lifetime.
   views::ImageView* icon_;
 
   base::WeakPtrFactory<PaletteTray> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PaletteTray);
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_SYSTEM_CHROMEOS_PALETTE_PALETTE_BUTTON_TRAY_H_