Fix theme change paint issue on linux.

chrome/browser/ui/views/frame/browser_frame.h

 // Copyright (c) 2012 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_FRAME_BROWSER_FRAME_H_
 #define CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_FRAME_H_
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/macros.h"
@@ skipping 90 matching lines @@
   // Overridden from views::Widget:
   views::internal::RootView* CreateRootView() override;
   views::NonClientFrameView* CreateNonClientFrameView() override;
   bool GetAccelerator(int command_id,
                       ui::Accelerator* accelerator) const override;
   const ui::ThemeProvider* GetThemeProvider() const override;
   const ui::NativeTheme* GetNativeTheme() const override;
   void SchedulePaintInRect(const gfx::Rect& rect) override;
   void OnNativeWidgetActivationChanged(bool active) override;
   void OnNativeWidgetWorkspaceChanged() override;
+  void OnNativeThemeUpdated(ui::NativeTheme* observed_theme) override;
 
   // Overridden from views::ContextMenuController:
   void ShowContextMenuForView(views::View* source,
                               const gfx::Point& p,
                               ui::MenuSourceType source_type) override;
 
   views::View* GetNewAvatarMenuButton();
 
   // Returns the menu model. BrowserFrame owns the returned model.
   // Note that in multi user mode this will upon each call create a new model.
@@ skipping 21 matching lines @@
   // Used to show the system menu. Only used if
   // NativeBrowserFrame::UsesNativeSystemMenu() returns false.
   std::unique_ptr<views::MenuRunner> menu_runner_;
 
   std::unique_ptr<ui::EventHandler> browser_command_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserFrame);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_FRAME_H_