Update app menu button MD colors for the notification case.

chrome/browser/ui/views/toolbar/wrench_toolbar_button.h

 // Copyright 2013 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 CHROME_BROWSER_UI_VIEWS_TOOLBAR_WRENCH_TOOLBAR_BUTTON_H_
 #define CHROME_BROWSER_UI_VIEWS_TOOLBAR_WRENCH_TOOLBAR_BUTTON_H_
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 38 matching lines @@
 
   // Removes a menu listener.
   void RemoveMenuListener(views::MenuListener* listener);
 
   // views::MenuButton:
   gfx::Size GetPreferredSize() const override;
 
   // WrenchIconPainter::Delegate:
   void ScheduleWrenchIconPaint() override;
 
+  // Updates the presentation according to |severity_| and the theme provider.
+  // Only used in MD.
+  void UpdateIcon();
+
   // Opens the app menu immediately during a drag-and-drop operation.
   // Used only in testing.
   static bool g_open_app_immediately_for_testing;
 
  private:
   // views::MenuButton:
   const char* GetClassName() const override;
   bool GetDropFormats(
       int* formats,
       std::set<ui::Clipboard::FormatType>* format_types) override;
   bool AreDropTypesRequired() override;
   bool CanDrop(const ui::OSExchangeData& data) override;
   void OnDragEntered(const ui::DropTargetEvent& event) override;
   int OnDragUpdated(const ui::DropTargetEvent& event) override;
   void OnDragExited() override;
   int OnPerformDrop(const ui::DropTargetEvent& event) override;
   void OnPaint(gfx::Canvas* canvas) override;
 
+  // Only used in pre-MD.
   scoped_ptr<WrenchIconPainter> wrench_icon_painter_;
 
+  // Only used in MD.
+  WrenchIconPainter::Severity severity_;
+
   // Our owning toolbar view.
   ToolbarView* toolbar_view_;
 
   // Whether or not we should allow dragging extension icons onto this button
   // (in order to open the overflow in the app menu).
   bool allow_extension_dragging_;
 
   // Listeners to call when the menu opens.
   base::ObserverList<views::MenuListener> menu_listeners_;
 
   // App model and menu.
   // Note that the menu should be destroyed before the model it uses, so the
   // menu should be listed later.
   scoped_ptr<WrenchMenuModel> menu_model_;
   scoped_ptr<WrenchMenu> menu_;
 
   // Used to spawn weak pointers for delayed tasks to open the overflow menu.
   base::WeakPtrFactory<WrenchToolbarButton> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WrenchToolbarButton);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TOOLBAR_WRENCH_TOOLBAR_BUTTON_H_